But I don't let the limitations of the game rules get in the way of the vision and fictional archetype I envision for my fighter. I want a character that straps on armor, grabs their weapons of choice and goes to face down giants. Is that realistic? Well, giants are not physically possible because of the square cube law. On the other hand in the words of Dutch from Predator, "If it bleeds we can kill it".
So, do we all get that the line between exactly what non-realistic things we will accept, and what we won't, is a matter or personal preference, and broadly could be treated as arbitrary?
You are okay with a mundane person taking on a physically impossible giant, but not okay with a guy in a bar fight goading a bunch of folks to bum rush him? Fine.
I am okay with that mundane person doing both those things. Also fine. I'm good with different people having different desires.
One game consistently supporting both of us with the exact same rules? That's the thing that's not a realistic expectation.