You’re describing very different use cases. Face unlock isn’t AI. It’s just using biometrics to generate a very complex password. It should and can run locally, I wouldn’t trust any provider to actually keep it local though. Everything else you mentioned happens in the cloud. You need a good amount of processing power to generate the necessary output, which happens on server farms. Thats why Bezos is looking into nuclear reactors to feed his farms enough energy.

If you think Musk has your fingerprints because you tweeted about the last restaurant you ate, we clearly have no common sense of reality and should leave the discussion at that

Social media is a privacy concern as well, but this is clearly on another level. I don’t save my biometric data on twitter. I don’t need facebook to live a full life. And as you said, there are anonymous alternatives. There aren’t when you travel. And living without travelling at least a little bit is kind of sad. So the comparison doesn’t fit.