MMA Insanity

Are the competitors that participate in Mixed Martial Arts insane?  Reefs to Go is an insane place to discuss MMA.  If you enjoy the MMA then what are you thinking?  The MMA is a crazy violent way to make a living.  If you have a serious injury you are out of work.  The nature of the fighting lends to serious injury.  How do you think fighting for a living works as a vocation.  I think that you would have to already have some brain damage to think the MMA is a good idea.  Unless you are fighting all the time for free why dot it?