Here's why...
It's basically a karate kid rip off
Bruce Lee is in it- actually his ghost is
Van Damme is in it -He plays a bad guy
It's an accurate depiction of Martial Arts in the 80's
The original was so bad that the distributor re-edited the movie when it was released on DVD
Fans were so upset they re-eddited back to its original cut and uploaded it online
You can watch both versions in their entirety on youtube
(fan edit)
https://www.youtube....h?v=se4WqH-D_fM (the other version)