If two people were evenly matched in strength, endurance, perception, anti-strike ability, and could rationally handle each other's boxing techniques, what effect would that have?
Without a doubt, it would become "idealized action design".
In fact, that's how it is. Many action and martial arts movies will consciously or unconsciously weaken the power of both attackers and defenders, leveling the playing field in terms of physical abilities and reactions. In reality, someone with significantly lower physical strength would faint if hit by a stronger person. But in movies, a martial master can continue fighting as if nothing happened even after being hit hard enough to vomit blood by someone with far greater strength.
Only when an expert is fighting a weakling is the "fragility of the human body" at play.
Injuries like bone fractures which don't show on the surface are also consciously or unconsciously ignored.
The fatigue and injury of muscles aren't depicted either.
