Altman doesn't have any stock. He's playing a game at a level people caught up on "capitalism bad" can't even conceptualize.
I guess if other people buying stock in your company is what enables you to have a super high salary (+ benefits like company plane, etc), you are still kinda selling stock though, and honestly, having considered the "start a random software company aligned with the present trend (so ~2015 DevOps/Cloud, 2020 cryptocurrency/blockchain, 2024 AI/ML), pay myself a million dollar a year salary and close shop after 5 years because 'no market lol'" route to riches myself, I still wouldn't consider Altman to be completely free of perverse incentives here :)
Still, very glad you pointed that out, thanks for sharing that information ^^