If there was any risk of controversy, why with DS and not any of the titles published by others? For example World of Darkness. Or manga where some characters were slaves bought or freed by the main hero.
The issue is not 'risk of controversy' in general, it is 'risk of controversy' for large and growing brands by large companies. WotC is huge, Paizo is probably the next largest pnp RPG company and something like Star Wars RPG might be big, but it also needs to be approved by Disney. They stopped serving a niche (of a niche) and went mainstream (as much as that is possible for pnp RPG).
These companies did their marketing research, identified their market and who has influence in that market. And this is the result. You can argue until you see blue in the face, but this is the reality at WotC (and other companies). Anything even hinting at certain controversy
World of Darkness is no longer an 800 pound gorilla it once was, White Wolf has been dead for a while as a pnp RPG publishing entity, most of the WoD is sub-licensed. Onyx Path ran their last WoD kickstarter project (M20 - Technocracy Reloaded) almost 3 years ago... But the still publish stuff (just not via KS anymore) You might have missed the whole shenanigans with Vampire the Masquerade 5E, it even went so far as that the current owner (Paradox Interactive) pulled the license and pretty much redid the offensive stuff...
As for manga/anime, have you lived under a rock? Let's not call them by name, but there have been quite a few manga/anime with these subjects and those have been problematic, many, many critics. And as I can only speak from what I've read on the English written side of things, depending on where you look, they have been quite vocal. The big difference here is that these manga/anime have not been produced for the English speaking western market, but for the local Japanese market. That these properties do well enough outside of the Japanese borders is a different matter.
OK, it is their business, their money, their responsability, but maybe they are listening the wrong voices.
"Listening [to] the wrong voices" might be interpenetrated very badly. But there are no 'wrong' voices, there is only the market and how a company can sell the most product. Looking at WotC, even before the current management issues, WotC was going into this direction. And WotC has a history (since they acquired TSR) of doing some thorough market research and I can't say I disagree with their evaluation of their market. And WotC has shown that their way is the 'right' way from a business perspective, WotC has never been bigger. This has never been about social justice or what is offensive to WotC, it's about where their largest market share is socially/politically located and marketing to that segment. To be blunt, if WotC/Hasbro as a company thought they would be more profitable with selling what they are now trying to remove from their product, they would.
There is a notable difference. This allusion to the Satanic Panic keeps making the rounds like it’s some sort of slam dunk argument.
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You want Dark Sun? It’s all right there in pdf format. Every bit of published material for your enjoyment. But I do t feel that it is appropriate for WotC to actively support that line knowing that it will make chunks of the fandom unhappy.
The Satanic Panic is probably the safest bet from all the examples, what it does is not only show that the fanbase and the company don't listen to everyone's unhappiness, just to those that 'matter' and bring in more money. The fanbase is selective and easily pressured by certain social groups, this is no different from the D&D fanbase from 40 years ago, the social groups exerting the pressure have just changed and their position (external vs internal). WotC is just playing that market the same way TSR was doing back in the day. That is probably not what some people want to hear, but that is the reality of big business.
That is also the reason why certain companies in the other (extreme) end of the social/political field failed so miserably. Is there a market for them, sure, is it big? No.
Imho DS was always a niche product, even back when D&D was a niche product (a niche within a niche). D&D might have gone mainstream, but I doubt that DS has gone the same route. I think that the D&D team at WotC has looked multiple times at DS and they must have come to the realization that if they bleach DS, there will be nothing left, putting the DS label on that left over pile will do more harm then good. New players are in virtually a new setting with an old brand name, that might have it's own stigma attached, while old fans do not recognize what is left of it and lash out at WotC/D&D. Better to leave it in fandom. And why cater to an older demographic, who's numbers only dwindle, while you have a far bigger pool of a younger demographic whom you can still sell product to for decades and a generation that is also far more willing to buy services instead of only physical books...
I absolutely agree with you, WotC is not in a position to do the setting 'justice'...

Better leave it in the hands of the fans that are left. And sites like Athas.org and the DarkSun Reddit have been at it for almost two decades, 3E/5E support, new adventures, new supplements, etc. If you want to play 5E DS you can. No official support of WotC required! And all the old products are available as pdf from DMs Guild.
The only thing I would like to see is that DMs Guild would allow third parties to produce material for all their settings, including DS. It is imho not necessary, just a nice to have feature.
Spelljammer had disappointing sales, but certainly not due to ‘bleaching’ (whatever THAT is…)
What is 'bleaching'? A very aggressive chemical used for cleaning and removing stains, but it also removes color...
Price isn't such a huge issue when the first 'real' product (besides a 3E Dungeon adventure) in almost 30 years is released. I was considering it as an actual physical purchase (for my already far too full bookcases), until all the marketing hit, and that was mostly/primarily focused on how they made Spelljammer PC. I don't mind PC, but if that's your main selling point, I start to worry. And at some point you need to realize and accept that WotC is no longer making the same type of product they were making 15-20 years ago...
Looking at the referenced reviews/reviewers on Wikipedia, I see only positive reviews of the product, reviews made by a younger generation of gamer. That pretty much indicates it's target audience.