Nikola, the EV truck company, was full of shit. The truck couldn't drive under its own power. Tesla FSD on the other hand, is just not as good as advertised. Kinda like how a Lindt Truffle isn't velvety bliss, or a 787 Dreamliner is still hard to sleep on, or even BMW's excessively superlative "ultimate driving machine." The 4 cylinder Z3 was a terrible vehicle.
One can wish FSD means perfection in every circumstance all the time, and Tesla certainly implied in its marketing that it is. In reality, FSD is really amazing at times and 'what-the-hell was it thinking' at times. But it does control speed, steering, braking, obstacle avoidance, traffic maneuvering, parking, navigation in a manner that, yes, I would call "Full Self Driving." It is very far from perfect, and Tesla has certainly communicated it as being better than it really is. there's a high dose of caveat emptor, but FSD does a lot more than any other car I've ever driven or owned. The fact that I will not let it attempt to navigate certain intersections, either out of embarrassment or risk of getting hit, does not diminish the fact that my car will give it the ol' college try.
I do think Tesla should get a substantial hand slap though, and should be required to give an extended free trial to everyone to see exactly what it is that FSD can and cannot do, and also give those who purchased FSD outright an extended refund window.