Elon/Tesla haven't delivered on unsupervised self driving cars, how is Tesla/SpaceX going to deliver on robots replacing humans?

Your claim that robotaxis and semis have replaced humans is not credible. Show me all the truck driver job losses due to self driving trucks.

Once the Tesla semi is shipping in greater numbers, I expect a lot of trucker jobs to disappear. Not all, and not even most, but still, tens or hundreds of thousands. (IIRC there are 3 or 4 million truckers in the usa.)