I had the exact opposite take, that him talking about that is (further) evidence he's a bit off his rocker. Not that being off his rocker is necessarily a problem. In fact, it might be the only reason he's doing interesting stuff with his wealth instead of just trying to turn it into more wealth for the sake of a high score.

The entities running the simulation knew you would think like that, which is why they put Elon Musk there so the simulated you thinks "nah, if I were simulated my life would be awesome".

But I'm not Elon Musk, and I'm not super rich and successful, so therefore I am real and he is as well and not a simulation. I don't know what things are like your simulation, however.

His mistake in his assumption is all games are the same. Sometimes I play a game that is kind of 'boring' and relaxing like a bit of solitaire. Other times I play a fragfest with 15 other people looking to take my head off. Sometimes I intend to play something exciting and end up playing max/min stats. Sometimes I just suck at the game...

I would assume most simulations would be more academic/business related, like how we have tools that simulate a wind tunnel, rather than for entertainment purposes