I do wish people would spend some time actually investigating how this system works before pontificating about it. It's not done. But it's far, far closer to done than you seem to want to believe.
[1] And after three such events kick you out of the beta program entirely.
[1] https://www.nbcbayarea.com/news/local/backseat-tesla-driver-...
Edit: Zaroth's comment makes it sound like it's now enabled for normal autopilot use as well https://news.ycombinator.com/item?id=29598520
I wonder if the more aggressive monitoring and alerts turn on when you enter the queue for FSD Beta as a way to monitor your alertness before granting entry into the Beta?!
What I'm curious about is what you mean by "done". You mean an autonomous Tesla that can drive without human supervision? Is Tesla close to that in your view? On what type of roads?
Turn the system on, keep a finger touching the steering wheel, then close your eyes. Boom.