This is what I don't get why people say they want high level fighters or barbarian to be like Thor and Hulk.
But they
are like Thor and Hulk. High level PCs are basically the Avengers. Flying or teleporting around everywhere, wielding potent artifacts, going toe to toe with literal Gods, Kaiju and Demon Lords (and winning) and dealing with threats to all of existence.
At 5th level, they're at Netflix Defenders levels of power. But at 17th+? They're literally fighting Gods and winning.
I mean a mid (11th) level Fighter, can easily take down a T-Rex, or half a dozen Grizzlies even without Magical gear (Caps Shield, Thors Hammer), and on his own. He can reliably fall from a skyscraper and walk away. He can load, aim and fire a Crossbow at such speed and accuracy he can reliably hit six bullseyes at 300' inside of 6 seconds, while moving 30' from where he started. That's already bordering on supernatural.
At high level he can go toe to toe with a Balrog, and win. Demon Lords have heard of his name and are wary of him.
The greatest warriors of Human history such as Musashi, Bruce Lee, Kosta Tszu, Mohammed Ali, Audie Murphy, Leonidas or Simo Häyhä (and even most Mythical Heroes such as Achilles) cant come close to those levels of power or emulating those feats.