Do also note that people wear glasses in private settings as well as public.
You're trying to assuage my concerns with the information about the light. That's Meta responding to these concerns and taking efforts to avoid upsetting anyone.
But once the market is proven then another set of glasses will be marketed as having the feature of silent recording. By that time the force of the market will be too great and my concerns will be laughed at and I'll be called a luddite and told I never should have had an expectation of privacy to begin with.
This is the embrace before the inevitable extinguish.
I'm not based in the US so hopefully some local laws will help me out a bit, but at the end of the day, the law is not my moral barometer. I will respect the rights of the users of these devices while also exercising my own rights, as much as I am able to, to treat them as social pariahs.