Quote Originally Posted by Max_Killjoy View Post
At least for me, I'm not refusing the possibility.

What I'm refusing is the idea that you can have a setting in which all three of the following are true:
  • Fighters can do things that are fantastic or impossible from the POV of our reality.
  • Those things are also fantastic from the POV of the fictional reality; that is, they're something special and reserved for a handful of "special" persons.
  • Fighters are not "magical" in that setting. (Note that "magic" DOES NOT MEAN "spellcasting".)
If you were actually open to the idea of level 20 'mundanes' doing awesome things, you would drop point 2.
Being level 20 is an extreme level of 'he just trained really hard'. Only one in millions (if not billions) reach that level. Of course it leads to doing fantastical things that people thought to be strictly impossible; after all, it is very possible that nobody else ever achieved it before, and just as possible that nobody else ever will.