Here's why:
* Lee's Emphasis on Realism: Bruce Lee was renowned for his dedication to realism. He believed in showcasing authentic martial arts techniques and considered wire work and other trickery to be dishonest to the art form.
* His Physical Prowess: Lee's athleticism and skills were unmatched in his time. He was a master of Jeet Kune Do and incredibly strong and fast. He could perform feats like the famous "one-inch punch" and execute acrobatic kicks with incredible precision. There was often no need for artificial enhancements.
* The Era of Filmmaking: While wire work was used in some films during Lee's era, it wasn't as common or advanced as it is today. It was more likely to be used for larger-scale action sequences, not the fast-paced, close-up style of fighting that Lee pioneered.
However, some points to consider:
* Limited Information: There is always the possibility of some minor instances where strings or other techniques may have been used. However, there's no substantial evidence to support this.
* The "Enter the Dragon" Argument: Some speculate that Lee might have used wires in the "Enter the Dragon" fight scene where he leaps through a window. However, this is purely speculation, and it could be attributed to clever editing and camera angles.
In conclusion, while it's not impossible that Lee might have used strings in a limited way, the evidence strongly suggests that he relied on his own physical prowess and technical skill for most of his stunts. He was known for his realistic approach and his dedication to showcasing authentic martial arts techniques.