No, he's clearly a grifter. OpenAI was launched with lofty visions and closed source ages ago, very obviously it's not at all for all the humanitarian missions Altman hyped it up for.
On top of which - these products just aren't that good. They may seem good enough to some at the major loss-leader costs that they're paying right now, but it's unsustainable. Either it has to collapse on its own or it will collapse when inevitably prices have to go up to at least break-even, which they aren't anywhere near.
It's hype and lies sandwiched in a neat little greed burrito.