Doors and locks only keep out the honest people. These use-cases have some political appeal but are absolutely impractical.

you clearly don’t know anyone with a restraining order or the fear that comes with your personal safety being threatened. there is nothing impractical with uploading someone’s face to your hole security system when you know that personal is a threat and should be no where near you at any time

Isn't this solely an appeal to emotion? How is facial recognition going to help in this case, where, if the tech were to gain some traction, bad actors would be aware of it and could take easy steps to defeat it? And even if the tech were difficult to thwart, at what point would the rate of false positives make it viable?