Critiquing the "Guy At The Gym" Fallacy

[Morty]

And many systems do not allow the trivial use of high-powered magic in the way that D&D 3.x does.

D&D's casual use of powerful magic is very much an exception, rather than the norm. Even when you compare it to systems where super-powerful magic is the point... though, honestly, D&D is also partly such a system, at least on high levels.