It's no different on a technical level than Waymo using remote operators. Presumably Tesla just hasn't wired that up, or doesn't plan to.

FWIW, your logic works better the other way around anyway: if the system didn't work, there would be easily-accessible proof to that effect showing the resulting hilarity as the operator needed to step in. There isn't.

And... of course there isn't. Because FSD is real and works and it drives a ton of us around every day. Is it possible that there are failure modes? Of course. Thus the safety personnel. But the bar of "if they believed it worked" was crossed years ago. Yes, it works. Duh. Go to a dealer and get a test drive if you don't believe people on the internet.