There's no reason to be rude. The point I've been trying to illustrate to you is that just because you don't deem it a liability doesn't mean Tesla, or governing bodies like the NHTSA don't. At the end of the day, if it were both technically feasible and not a liability of some kind, Tesla would have allowed that functionality. They didn't disable video while driving to spite you.
We can speculate all we want as to why they've chosen to do so, and that's what we're doing here - speculating. Your guess is on the specifics is as good as mine.
Do you have a reasonable theory as to why the NHTSA would consider a safety issue for those sitting in offices to be able to see a live stream of someone driving?