[Noob]

Submission grappling is quite a bit more difficult for an uneducated viewer to appreciate. Boxing is so much more visually impressive, and in an easy fashion. The speed, flying hands, footwork.

Two guys laying on each other for twenty minutes, which is what it looks like to a lot of people, is much more difficult to keep a crowd's attention. There isn't nearly as much explosive athleticism to be displayed.

Both boxing and grappling require educated audiences to fully appreciate the artistry of a match, but boxing can be entertaining even without a complete understanding of all the fine details. Submission grappling is more dependent on familiarity with it to ingratiate the same fan value.