Why not heel hook at WB?

When you are a white belt you are fully aware that you will get hurt so why not get rid of the bumpers and let the heel hooks begin. WBs at tournaments are restricted from doing this “Dangerous technique “ when in reality it is the coaches responsibility to show the competitors which way to roll ,slip, and boot. If you are paying money to compete in an adult bracket and there are rules other than no slamming then you are diluting the sport as a whole for extreme safety if you want that go play golf not a sport where the goal is to destroy another human. Thoughts??