oh. Now I get what you're getting at with this double standard thing.
That's a horrible example of it, though.
Giving the fighter an ability to leap tall buildings in a single bound isn't genre appropriate for the fighter's flavor.
You mean the core fighter, before considering sub-classes, I had to remind myself
- yeah, I get that you need the core fighter to be preserved from the superhuman as well as the supernatural & the overtly magical, to keep open options closer to gritty-realism (though, I really think you'd have to limit level, severely, as well).
But, yes, superhuman abilities like leaping over a castle wall could be opened up in some hypothetical sub-class - or new class without so much design space locked up, nor so much baggage - at some appropriate level...
To borrow my example from above, adding such a feature to tbe Punisher would drag him across that line under the Russian's feet, and turn him into a character with the flavor of Captain America.
Which'd be a fine flavor for a fighter sub-class, like the Knight, I suppose.
Nose dive off a 1000' structure and stick the landing.
Routinely jump 20' at will.
I'd just like to contrast these two (not to pick on them or you, the contrast just struck me).
The former is humorous, but it's otherwise perfectly plausible, a high-level character can suck up the average 70 points of damage from falling 200' or more ('terminal velocity' doesn't work quite the same in a fantasy world), though he'd have to negate that damage - for instance, with the 1st-level Feather Fall spell - to 'stick the landing' (not land prone).
'Realistically' people just do not survive terminal-velocity falls. Falls from surprisingly great heights, with horrifying injuries, sure, but not, rest an hour, you're fine.
So, yeah, pretty superhuman. Not a fighter ability, per se, and significantly more painful than sticking the landing with feather fall, but there it is.
Compare that to a 20' long-jump. That's not superhuman, but it is very impressive - if you're competing in middle school track & field.
Further, depending on how the DM lets athletics interact with jumping.
I should certainly hope so!
To be fair, it's only another 10' from gifted kid to world-record-holder Olympian.
The line is drawn somewhere between the two extremes. That it should be more than now and less than jumping over castle walls (although there's an argument there for wuxia themed games) isn't an argument that it cannot be drawn at all.
Less than jumping over the moon anyway ("what, not even the full moon first thing in the evening when it's really close to the horizon?" "No." "But that cow did it..." "Yes, but it's a Sacred cow, sorry.")
The fighter (esp. at high level) might be an unrealistically good warrior (compared to actual reality). But (before you add EK or the possibility of magical items) the fighter is entirely grounded within the genre expectations of what is possible within the limits of human (or fantasy race) capability. Especially, the genre expectations of a character who is a protagonist of the story.
A little overboard in some areas, due to system artifacts (like hps, that apply to all classes, really), a little too grounded in some, washed aground on 'realism' in others. It's very uneven.