You have to blame the people who have the power to stop or slow him down.

Fighter
Promoter
Boxing commission
Licensing board

I'm all for everyone having the freedom to do what they want with their lives, but in no fucking way do I want my entertainment to lead to someone's death or life as a zombie, especially if it can be prevented.
Will I watch motor sports, skydiving, bungee jumping, bull riding and some knucklehead going over the falls in a barrel? Hell yes, but these people are operating without diminished capacity or an otherwise damaged brain.