I think in fact a lot of people do want them to do this. Folks complain the Play store is full of malware and spam, and that there are data leaks and deceptive ads.
Then Google or Apple goes and removes them, and then folks are mad if that process has errors.
It seems like a business where you make everyone mad no matter what you do.
[edit: Just to be clear, I'm not a fan of the practice. But an awful lot of folks seem to think Apple and Google SHOULD wield editorial power, if only to stop outright malware. And of course, certain politicians want to make sure that the internet refuses to show content unflattering to people in power]