On OSX at least, some apps are developed by third parties whose code isn't easily scrutinized by Apple or by end users.
I think Apple's policy helps users navigate that situation pretty well. But I also can't see any good reason to prevent users from disabling that feature in a fine-grained way. E.g. per app and/or temporarily.
Apple not taken anything away. What they have done is change a default. Since defaults matter most to the least savvy users, skewing defaults toward security makes sense. Power users can apply extra skill to change the default; that’s what makes them power users.
It's unfortunate it causes problems for some users, hopefully a fix will be forthcoming, but I believe it's an oversight.
https://www.washingtonpost.com/news/the-switch/wp/2013/12/18...
PCs and third-party webcams are of course another matter...
In the Privacy menu in MacOS now, you can authorize applications to do things like use locations services and record the screen. I think it would be reasonable to include an authorization for audio recording and bypass the orange indicator. Or they could turn on the webcam green light when audio input is active?