You're comparing apples and oranges. Rocketry is a domain which until very recently was completely the province of governments. Lack of competition definitely causes problems with innovation. Also, I've read some articles that suggest SpaceX is unlikely to achieve the economies they tout.

The car industry has essentially always been very competitive, with a number of innovative companies. Consider the rise of hybrid cars with Honda and Toyota leading the way. GM famously did a lot of the pioneering of modern EVs.

Also, the point grandparent was making is that you see a similar pattern of deception from Tesla. Sure, maybe sometimes it works out. But not always.

Another interesting question is whether deception is actually bad for human advancement in the long run. In fact, maybe the answer is no. I bet a lot of innovations came about because of founders essentially lying to investors to get a check and then ultimately finding a way.