As some have already said, kata will not make you a fighter. But a fighter who practices kata will have a greater understanding of their art. Kata is the building block of karate and other martial arts, and I personally believe Bruce Lee to have been ignorant about its use. By this I think he only looked at kata/forms from a 2-demensional way, by taking the moves literally, as one long fight scene, but actually they are a library of techniques that individual moves and combinations can be used. Although a very skilled and knowledgable martial artist, who was also an inovator, I believe him to have also been lacking in knowledge in certain areas. I know he didn't like Japanese martial arts as he was chinese and anti-Japanese, but he said karate is like an iron bar. He was obviously talking about Shotokan, but not all karate is like that. The majority of Okinawan Karate is fluid and flexible, and so are some of the Japanes styles. So before anyone starts saying Bruce Lee said this and that, he did not know everything. A house needs foundations to be built on, in karate, kata are those foundations.