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.
But the waveguide method has limitations rooted in physics and math that won't change until 30%+70% stops equalling 100%.
I know which one I'd put more Hope's in.