The “Hey *” (Meta, Siri, Alexa) is typically handled by a simpler mechanism on a short buffer that triggers the proper recording and speech recognition workflow in order to save battery. But if you’re not going to trust the company, then the fact that it responds to Hey Meta shouldn’t make any difference because it could still be quietly recording. The fact that it responds to a wakeup prompt changes nothing.
I'm aware of the mechanism, but that mechanism relies on a mic that is always on.
I agree that the primary issue is that it's a software-controlled microphone with no off switch controlled by software written by Meta. I only emphasized the wake word listening in response to OP's claim that it's not always on when it must be.
The camera may or may not be always on, but it can be turned on by software activated by the always-on mic (again, demonstrated by the promo video), so it would be best to treat it as though it is.
[0] https://about.fb.com/news/2025/06/introducing-oakley-meta-gl...