That's not the problem Apple was trying to solve here. I suppose I could see a system where every camera/screen recording access by QuickTime Player forces a p

That's not the problem Apple was trying to solve here. I suppose I could see a system where every camera/screen recording access by QuickTime Player forces a popup, because you can't say whether it happened intentionally or due to opening a malicious video file, but that would have to be opt-in for sure.