It is an easy and cynical statement. And I am saying that as a cynical person myself. The game is heavily tilted, but it is still a game with real winners and real losers.
I do not want to assume too much though. Would you be willing to elaborate a little? It is difficult to argue Musk is not competent at his various roles. Are you saying he was guaranteed to be where he is now?
I was more referring to Trump not being necessarily competent, but using a big public profile to con people into handing over money and then deliberately not paying people and using bankruptcy to shield him from consequences. It's more a lack of morals than being competent.
Once someone has a lot of money, it becomes very difficult for them to decrease their wealth as capitalism rewards people/institutions that have lots of money and/or influence. If you have money available to purchase your way into owning various companies, then it's not too difficult to keep those companies alive though I would say that Musk has made some good decisions as to which companies to buy. I would consider that Tesla became successful partly due to a new potential market (which Musk should get some credit for spotting) and partly due to reaping the benefits from all the workers there - it's their talents that are making Tesla profitable and Musk is merely ensuring that he doesn't pay them sufficiently so that he can increase his own wealth.
Billionaires benefit from their own lack of morals more than being spectacularly competent.