Except you're jumping the gun by assuming your hangups are the main reason they are failing, rather than defaulting to a more reasonable explanation that the overall production was just poorly justified or made overall.
Like, does the virtue signalling actually take priority in any of the examples brought up here? Did Airbender and GITS really fail because of virtue signalling? I don't think so at all. Neither did Dragonball Evolution fail because of having a white actor lead. There would have been just as many problems with the movie if they'd cast an Asian actor as the lead, let's get this completely out there.
These are all cases of bad shows being bad, bad movies being bad. There are plenty of series where diversity happens where it did not in the original, and the series were good because they were good. Battlestar Galactica comes to mind as an example. Even as far back as 10 years ago, people were criticizing making one of the leads a female, and people had major hangups over Starbuck's casting. Those issues don't even matter today in retrospect and no one gives credence to those former hangups.