There's a line. A fighter jumping 60 feet or more is literally going too far.
Besides, that's not what people really asking for.
It's just an example. If you already, personally, conceptualize the deeds of high-level fighters under the current rules as superhuman, than why are those superhuman deeds ok, but some other prospective ones (let's say 40 or 50 feet, rather than 60, maybe?) out of bounds?
I know this may be a "I know it when I see it" subjective judgement, but I'm just noticing an apparent conflict between what you said about high level fighters a couple of comments ago and your general stance about martial characters needing to be bounded by real world or action movie physics.
For my part, when 3.x forbade Sneak Attack from working on Undead, Golems, Ooze and so forth, I acknowledged and agreed with the logic, but then in play I saw that it was less fun. 5E allowing it to work on them at first strained my disbelief, but in practice I find that I can fluff-justify it sufficiently to be happy with it, especially since it makes the game more fun.
I think the same sort of exercise is certainly possible when it comes to conceptualizing high level martial characters as more like CuChulainn or Sir Kay or a Bogatyr, and less like James Bond.
If I want a game where they're more like James Bond, and mages simply outclass them or have OTHER setting-specific restrictions and limitations which wouldn't fly in D&D, there are other systems I can play.