That is a very obvious thing for them to say though regardless of what they truly believe, because (a) it legitimizes removing the cap , making fundraising easier and (b) averts antitrust suspicions.
One remarkable advantage of being a "Public Benefit Corporation" is this it:
> prevent[s] shareholders from using a drop in stock value as evidence for dismissal or a lawsuit against the corporation[1]
In my view, it is their own shareholders that the directors of OpenAI are insulating themselves against.
That's literally the premise of venture capital. This is a scenario where we're assuming ALL our bets will go to zero, except one which will be worth trillions. In that case you should bet on everything.
It's only in the opposite scenario (where every bet pays off with varying ROI) that it makes sense to go all-in on whichever bet seems most promising.