Maybe you should take some martial arts lessons first before spouting crap out of your rear end.  Ever watched football and boxing before?  Pretty much any contact sport and also most other non-contact sports have a high likely hood of getting a serious injury too.  That's the reason why there's so many rules and regulations monitoring these sports.  If you actually watched any MMA matches, you would know that it is a lot different from the no holds barred street brawls that you see in back alleys.