I want apps to be able to do that!
Is there an opinionated reason not to break out capabilities?
If you have a disability and need tools to use your computer the last thing you want to do is have those things not only off by default but complicated and involved to turn on.
accessibility.screenshot accessibility.paste
and whatever else there is. that completely removes the issues for apps like this.
The issue is with Apple's UX. Apple insists on asking permission for every little capability an app wants. So I would have to say "yes, allow this app to take screenshots" and "yes, allow this app to read the clipboard".
I wouldn't be surprised if, in the near future, Apple forced people to click "yes, allow this app to read the clipboard from app X" and then separately "yes, allow this app to read the clipboard for app Y" and so on for every single other app on my machine.
Apple does not allow you to say, "yes, I trust this #$@-ing app, please allow it to do whatever it needs."