Did Bruce Lee master every martial art?

Answer 1

No, he approached the most well known fighting styles of his day like a buffet. If you have ever gone buffet dining, as you are well aware a buffet plate is filled with several different entrées to make a meal. He picked and chose techniques he liked, and then drilled them to death. The reason he was so proficient with Martial Arts technique though is due to his Beijing Opera training.

Beijing Opera involves a lot of acrobatics, and, it is what his family did for a living. His father was a wealthy Beijing Opera actor, and he personally coached all his sons in acrobatic training. Lee's views on forms, tao lu, kata, poomseh, whatever you call them in your style, are unfair because the purpose of those exercises is to develop coordination and agility. Its easy to say katas and related forms are useless, when you can do backflips and somersaults. For the remaining 90% of us though, lacking extreme acrobatic training, we need to develop coordination.

The flashy stuff people like about martial arts is rooted in agility, extreme coordination. In the simplest terms, if you can do a back flip, or mid-air somersault, then you SHOULD be able to kick high without falling on your rear. Incidentally for what its worth, all the best MMA fighters are extremely agile; how often have you seen them do a flip when winning a fight? If you ever watched "The Expendables," Randy Couture shows off some pro Wrestling moves, to demonstrate that MMA guys are just as athletic as pro wrestlers.

Case in point; agility DOES matter, and whoever has more of it does get the edge in a fight. Forms were invented with the mind that most people, are not fortunate enough to receive agility conditioning at an early age. Your best hope for coordination development, is kata. Bruce Lee did not master all fighting styles, the man just had extreme agility which he applied to martial arts, and in the movies, he used "entertainment kung fu" as he called it or "show kung fu." To make clear that what he used in the movies was all theatrics, different from what he used in actual fighting.
Not at all! because not all types of Martial Arts disciplines didn't exist on a popularity or a quality when the Sifu-Bruce was alive from that time.

and there was another reason besides the existence;

the practical was a choose while the less practical was discarded

Answer 2

Of course not, but that fact would not fall within his "legend".