Imaro
Legend
It hasn't even always been that way either. There are plenty examples of characters performing extraordinary tasks without needing to resort to supernatural abilities. In 2e, a high level fighter had ~90% chance to make any given saving throw. The high level 5e fighter has around 20% - 50% chance to make a save (depending on proficiency).
In 3e, a high level fighter could wrestle a giant and win, knock such a creature back with powerful blows, control the battlefield with multiple opportunity attacks, jump 50 feet in the air, cut through solid steel walls with ease, and lift 20,000 lb boulders without breaking a sweat. In 5e, a fighter can't grapple or shove a creature larger than an ogre. The 5e fighter can lift only a small fraction of the weight, and can jump 8 feet up at most.
Hell, even the 3e warblade couldn't do anything supernatural, but he could stun enemies, daze them, dash around the battlefield, hinder their movement, and otherwise create a variety of interesting martial effects that the 5e fighter simply cannot replicate.
In 5e a Fighter can draw on an extra reserve of energy (Action Surge) to move an extra 30ft/ use a skill/attack/etc....
In 5e a Fighter can heal himself with Second Wind...
In 5e a fighter can reroll failed saving throws...
The Battlemaster will have 7 of these maneuvers by 10th level...he can also gain more through feats if used...
In 5e a fighter can inflict the Frightened condition on a foe...
In 5e a fighter can give up a bonus action and a single attack (of the multiple he gets) to give an ally an immediate attack...
In 5e a fighter can disarm his opponents...
In 5e a fighter can give advantage to an ally for the next attack against an opponent he is facing
In 5e a fighter can increase his AC while moving...
In 5e a fighter can grant temporary hit points to an ally...
In 5e a fighter can give an enemy disadvantage to attack everyone except him...
In 5e a fighter can increase his reach on an attack by 5 ft...
In 5e a fighter can reduce the damage he takes from an attack...
In 5e a fighter can increase his chances to hit an opponent...
In 5e a fighter can push a Large or smaller opponent up to 15ft away...
In 5e a fighter can attack off turn if an opponent misses him with a melee attack...
In 5e a fighter can damage multiple enemies with one attack...
In 5e a fighter can knock any sized target prone...
The Battlemaster can also observe a creature and determine it's relative strength to his own...
This is all outside of the numerous attacks the fighter gets.