To me, that sounds like he acknowledged his power but disagreed with the person who said it. He's just repeating the question but shifted to it being fulfilling (and not about money). Without the question being included, I think it's hard to use this quote as proof.

He's also said something similar in another interview:

“One of the takeaways I’ve learned is that this concept of having enough money is not an idea that’s easy to get across to people. I have enough money. What I want more of is, like, an interesting life, impact; access to be in the conversation. So I still get a lot of selfish benefit from this. What else am I going to do with my time? This is really great. I cannot imagine a more interesting life than this one and a more interesting thing to work on.”

I think I can see how you interpret it that way.

I certainly didn't interpret as him disagreeing with his statement "I mean I have like lots of selfish reasons for doing this"

It's the "as you've said" part of "as you've said I get like all the power of running OpenAI" that would make me inclined to think what you wrote here.

But I do think there's a greater chance that he is saying that he does like the power.

There's also another quote either in this video or the other one I shared I think where he's asked why he's doing this, or what motivates him, or something like that, and he responds with something like "I'd be lying if I didn't say I really like the power"