so the problem boils down to control and agency. And Meta has proven to reliably ignore anyone's agency if it has control.
Yes, constantly recording drains battery, but the device does not have to be constantly recording to be dangerous. Meta can, through a firmware upgrade that the user has no choice but to install, add particular conditions when the device is recording even though the user might not intend it to or be aware of that.
Not a hypothetical:
https://www.svd.se/a/K8nrV4/metas-ai-smart-glasses-and-data-privacy-concerns-workers-say-we-see-everything