I’ve once read an article which states that a key reason why manufacturers don’t bother to make more than 720p web cameras is because many conference/video calling software including FaceTime support only 720p (and those which support higher don’t do so very well). So to have one any better would be pointless unless you wanted to take selfies I guess.
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We have Facebook, Instagram, Snapchat with millions of people happily posting selfies and a lot more.
Now, try get them to now also post their passwords...
Your face isn’t as valuable as you think it is. It just isn’t a security risk otherwise you wouldn’t go out without a paper bag on your head. There aren’t many things you hide from others as much as your credentials.
It is both irrational human behaviour but also a normal phenomena for people to be scared about their webcam and mics being hacked. But when you break it down, you realise it makes no sense to protect your face more than your credentials online.
I think it's just a fundamental privacy thing. You buy blinds because you don't want people staring at you doing nothing in your own house, same reason applies for the camera. Even if your image is useless, it just feels better to know that window has been shut.