The Rogues were pretty overpowered.
Although spellcasters had all kinds of abnormal means, and Fighters were resistant to all kinds of attacks, the Rogues were naturally proficient in various skills did not lack achievement. For example, killing monsters of more than 10 monster level by leaping over the level gap, diving into dungeons of challenge rating 12 or above to steal treasures, or playing a bit of astonishing acrobatics with the help of high Dexterity.
This was not something out of the ordinary.
Rogues were a profession system that makes it easy for people to show their own advantages.
They could sneak, attack, assassinate, dig holes, pick locks, steal, refine gold, make poison, had good literacy, had good acting, could listen well, and do well in the wild.
Among the basic skills, there was no profession more versatile than the Rogue. (Rogues have the most basic skills.)