It might not seem like the case right now, but I think the real disruption is just about to begin. OpenAI does not have in its DNA to win, they're too short-sighted and reactive. Big techs will have incredible distribution power but a real disruptor must be brewing somewhere unnoticed, for now.
That they reached a different conclusion than the outcome you wished for does not indicate a lack of critical thinking skills. They have a different set of information than you do, and reached a different conclusion.
That's not at all obvious, the opposite seems to be the case. They chose to risk having to Microsoft and potentially lose most of the equity they had in OpenAI (even if not directly it wouldn't be worth that much at the end with no one to do the actual work).