I have to completely disagree that MMA practictioners are just those who couldn't make it in boxing, even though I myself held that view just a few months ago.

People do what they love, are all UK rugby players playing it just because they can't get into professional football?

Do Rally car drivers race only becuase they can't get into Formula one?

If someone enjoys wrestling, Muay Thai, Jutitsu etc it's because thats what they enjoy doing.

It's just as absurd to think that anbody into martial arts MUST consider boxing to be the best one and that if they practise something else it's only becuase they arn't good at boxing, as it is to say anyone who plays a ball sport MUST either be a professional American Football player if living in the US or a pro soccer player if living in the rest of the world.

By this logic you could argue that every American heavyweight is only boxing because they couldn't make it in basketball or as a linebacker.