Because other people can be Bruce Lee.No one can be Chuck Norris besides Chuck Norris.
Because he's Chuck Norris.Duh!
Because Bruce Lee died young, thus ridding him of the throne. Also, I class different races of Chuck Norris.White- Chuck NorrisBlack- Mr.TAsian- Tony Jaa - Go watch Ong BakHispanic- ???
That makes no sense plenty of people can be Chuck Norris.
*cough*Bruceleefanboy*couch*
...he is in alot of action films, and he is a martial artist. He wrote books...