What if that chip output a facial UID, for help with 'hey, that's someone I know'

what if i don't want to be recognized by you? or by anyone else? the problem is not that it allows some people to recognize me. the problem is that it allows everyone to identify everyone else at scale.

if this tool can help someone because they have a medical condition then we can make these devices specifically available for them. that's just like allowing support animals in places where animals are not usually allowed to be.

I like the "service animal" analogy. But it's not that easy to escape the ethical fork/tradeoff, as the breeding of universal companions would be far better resourced than that of service animals. Then it's not "only some people are allowed to have cell phones", it's more "we'll ban cell phones and if someone really really has needs, we'll let them have a milk-carton brick of a radio telephone", with an implicit "and that will be good enough for them".