The silliest example of this I've seen is "private browsing" mode not allowing screenshots. The point of the mode for me and everyone I know is to have isolated

The silliest example of this I've seen is "private browsing" mode not allowing screenshots. The point of the mode for me and everyone I know is to have isolated browser sessions for the websites I visit and not have the browser add them to my browsing history. Not to shield what I'm seeing from the OS itself when I try to disclose it.