It’s incredible to see RL reality mentioned as an argument where you can summon feys from another planes of existence.
It's called suspension of disbelief. Players want illusionary realism so they can imagine that these characters and this world are real. Most audience members want the same thing in a movie, even if the mechanics of the movie would break down under real scrutiny. Players don't want the game to jump the shark.
Suspension of Disbelief is a big deal, and it's one of the cornerstones of 5e and roleplaying.
