Musk appears to be objecting to a structure having profit driven players ("YC stock along with a salary") directly in the nonprofit...and is suggestion moving it to a parallel structure.
That's seems like a perfectly valid and frankly ethically/governance sound point to raise. The fact that he mentions incentives specifically to me suggests he was going down that line of reasoning outlined above.
Framing that as "Elon Musk wanted an OpenAI for-profit"...idk...maybe I'm missing something here, but dishonest framing is definitely the word that comes to mind.