When I was in Haneda airport, a machine tells you which of 4 lines to go to and if you have forgotten there is a screen with live camera feed from screen POV and little boxes drawn on top kinda above you with your line.
I thought it was pretty neat, but felt super invasive.
CBP facial recognition is far less invasive. It's not an instance of "rampant facial recognition" in my opinion. There is really no downside, "they" already know you might be at the airport because you booked a ticket, since most US airports don't let to the air side without a ticket. You are already on bunch of cameras inside the airport, including right when:
1) your ID verified by human or by a kiosk
2) when you drop off your bags
3) when you board the plane
4) every other time you have to show your ID or boarding pass
You do you though.