I agree that this is simply Altman extending his ability to control, shape and benefit from OpenAI. Yes, this is clearly (further) subverting the original intent under which the org was created - and that's unfortunate. But in terms of impact on the world, or even just AI safety, I'm not sure the governance of OpenAI matters all that much anymore. The "governance" wasn't that great after the first couple years and OpenAI hasn't been "open" since long before the board spat.
More crucially, since OpenAI's founding and especially over the past 18 months, it's grown increasingly clear that AI leadership probably won't be dominated by one company, progress of "frontier models" is stalling while costs are spiraling, and 'Foom' AGI scenarios are highly unlikely anytime soon. It looks like this is going to be a much longer, slower slog than some hoped and others feared.