A rehearsed combat demonstration may well look exciting, but what does it show?
Does a would-be new starter earnestly expect to be undertaking that level of training from the onset?
Rehearsed combat proves nothing and ultimately shows nothing.
Real life assailants will not attack in a known pattern, using known angles of attack or styles of assault.
The melee of unrehearsed combat is less entertaining; more frightening and significantly less polished.