What's wrong with doing it for fame, money, or recognition is that those things are completely contrary to parkour's philosophy. Show me an athlete who's first, absolute priority as an athlete is self improvement, and who strives for fame - it isn't possible. Sure, you could find an athlete who only chooses the path that is best for him/herself, and will accept fame if it happens to be on that path, but to give it any priority is impossible while maintaining an ideal of self improvement. For one, humility is a necessary virtue if one is to truly progress as a person. Same goes for money. Although, I will concede that I see nothing wrong with parkour as a means of making a living - you have to live in order to improve after all...
And Sat, have some courtesy. Please. I respect your opinions and views, please have some respect for others'.