I think it's true that market forces are play an important role here. I don't think it's true that they are the only deciding factor. That is, I see statements from people who make decisions at WotC that are not simply "this is where the market is", but imply a kind of moral valence or necessity to the actions they're taking. I don't think that is just marketing.
A hypothesis: if the designers said "we are making change X to meet market demand" rather than "we feel this change is morally correct" they would get less pushback.
So you feel the issue has little to do with storybased gaming vs site-based dungeon crawling, or perceived deadliness of the game or the traditional arguments for why grognards don’t like the direction WotC has taken D&D - instead it’s the moral stance they’ve taken and changes in the rules that reflect it?
Several thoughts here. First, I think the OSR is a complex community that has more extreme views in many directions than WotC. It's not a haven but it does have more of what people want.
Which people precisely?
Second, I think the importance of WotC support is hard to deny. It is not just first among equals--it exercises an outsize influence in the space.
Again, what influence? The OSR community was built as a counter action to the direction WotC took the rules when the game became more of a focus on heroic PCs and tactical rules.
This seems more like the reverse: This is not about WotC influencing the industry, it’s about certain grognards wanting to influence WotC - not that these grognards have no place to go or system to turn to.