True, but it's even ruder that viewers demand that publishers kowtow to their wants and desires over the players and DMs who actually use their books.
How is it rude for consumers to express their desires for products to the companies producing them?
It it just good business sense if those companies produce products that large numbers of people want. There have always been consumers of TTRPG material, whether active players or not, who buy material more to enjoy reading than to put into use at the table. I really enjoyed Ravnica and both of the two recent Eberron books, though I doubt I'll ever run a campaign there. I already have enough material to run games for many years. But I still enjoy reading setting books.
Also, since I don't really have the time to keep up on Critical Role, I'm excited for the cartoon and it about having the setting book to add to the enjoyment of the world the CR team created. As a DM running a game set in the Lost Lands (Frog God Games), I can still get inspiration from other setting books. Even if I stopped running or playing in games, I can still enjoy reading the setting books.
The great thing about good setting books is that they can be enjoyed as lonely fun but also used to run games in.
I can't comprehend how this is taking anything away from anyone.
Even if the CR book is responsible for pushing away the release of other setting books (which CR and WotC claim it is not), as an old grognard, I just don't care. I've got the original Greyhawk on PDF and can still run games in that setting. Fans of older settings can still get materials for those older settings. Fans of new settings that have not been published can't. Supporting brand new settings tied to wildly popular shows and other games only makes sense.
If I want setting material that was popular in prior editions, I really don't need for it to be released in 5e. I can still get those materials pretty easily on DMs Guild.
If they revamp older settings for 5e and print them in high-quality hardcovers, that's cool, but they are going to make those decisions on how many copies they can expect to sell. I can't see how a Dark Sun, for a popularly cited example, can hope to compete with a CR or MTG source book, given the relative sized of their fan bases.