This is what I don't get either. We literally have dozens of various camera options monitoring us in public, from random video doorbells to store CCTV, state/police CCTV, Google Maps cars, people on their phones, police officers and even random hired security thugs posing around with wearable cameras, drones, you name it... but the problem is cameras built into glasses?

Most European countries have actually codified that one has no expectations of privacy in public - that is, one may be recorded while out and about. Of course there's legislations about harassment - e.g. following someone with a camera and specifically recording them, in an attempt to harass or threaten them - and what essentially constitutes as blackmail ("I'll remove this video of you if you pay me"), so people should be using the recourse for those crimes, not criminalising a new product category.

Just owning a camera didn't make upskirt photos legal, nor does using a Meta camera glass make harassment legal.