I don't doubt for a moment that Peter would have subjected himself to the same learning curve, because clearly he gives a shit about issues. That's a laudable trait.
No, he feels like a failure because he believes he was destined for greatness and as a result we all have to suffer his desperate need for affirmation.
Consider that he only gives a shit about issues of white male privilege and accuses all those who express empathy for non-white males of “virtue signaling”. Or how he demands everyone agree with him while condemning "them" as authoritative.
You are of course generous to make peace with that or try to inject some kind of passion in his motives but I just see it as the pathology that it is.