SpaceX is private, so its books are closed and there is no publicly reviewable valuation.
Tesla is public and has had < 5 profitable quarters in its existence. None of Elon's existing companies have been able to turn a profit. Paypal does not count as "his" since he joined there on an acquisition and he was only CEO there for a few months before getting the boot.
They didn't need to become huge right away, that was his gamble, and it remains to be seen if that will pay off.
With what I said was more aimed at the argument that building electric vehicles isn't a straightforward business where there is nothing to innovate and the purpose is just to get profitable as quickly as possible. But yes, as you say, they invest it all back.
I wonder if the negative side in the whole argument would just like the profits and stock go up as fast as possible, and that is the reason for unhappynes?
Are you serious? I can throw a rock at any newly minted tech IPO in the last year and almost guarantee that it's not even remotely close to being in the black without even hearing the name.
For profits, I think it's pretty obvious that both Tesla and SpaceX will start making a profit quite soon, and will probably make a lot of it in the long term. (Maybe they are making a profit even now? Sorry, don't know, I'm just a random developer...)