I'm not saying he didn't write this himself. But I am saying that if I were in his position and knew that I had no way of getting out of something like this, I would have no trouble at all (technically, not morally) faking sincerity and admitting all my actions while tying them into a larger framework such as sexism in the startup industry.
It's an admission of guilt. It's not brave, it's just an unconditional surrender.