People freak out at the idea of cameras of some random dude constantly watching them.
This is a bit funny because they'd be watched by multiple cameras in any restaurant or supermarket. OTOH the viewpoint of the overhead monitoring cameras is very distinctive, and the resolution is usually barely enough to see a face. The Glass's camera gave more "normal" and higher-resolution footage.
People freak out because it's worn by a _person_ who, specifically, is watching _them_.
You'd probably react similarly if somebody, during a party, for no reason kept pointing a recording microphone at you, even though there were voice assistants like Alexa in the room.
People are discussing whether AR device could be worn in public. But I’m wondering: should it? I mean, I’m the last guy to question novel technology. I was desperate to get the first smartphones. But why would you want an always-on screen in public?
I was working on enterprise Google Glass apps in 2014. The problem was lack of applications. You could do very few things with it beyond showing some text and pictures.