The "Bruce Lee Battle Cry" is at least in part why he died at an early age. In Chinese martial arts (and their descendants) breathing is an important component of all activities. In fact, breathing is the key to all power.
Grand Master Ark Wong tried to teach this to BL. He warned that BL was breathing incorrectly and would die a young man.
Wong outlived Lee.
The irreparable damage done to the martial arts by Lee cannot be measured. Everything from helping to make Nunchaku (an Okinawan weapon not Chinese) illegal, to having every lowlife and trouble maker attracted to the martial arts.
To this day, martial artists cannot workout in public without some idiot yelling out some variation of the Bruce Lee Battle cry.
In short; Bruce Lee died young because he was a screw-up not a hero.
BTW, Ark Wong was in his 80's when he kicked BL's ass.
I have to agree about the HSM stuff though.