Not really addressing your primary point, but regarding his parents, I remember prior to his first fight in MMA, I'd read that his parents were ok with his decision to drop out of high school to pursue wrestling and boxing.
Obviously, parenting is about love and support, but a 17 year old not even graduating highschool and choosing instead to focus entirely on a sport with notoriously limited career longevity.... wow. Granted, he's done well for himself, so arguably, it worked out all right. That said, he doesn't seem too bright.