They can't help it. Most of the antagonists in MC Who Hides His Strength are not intelligent by nature. They are the product of circumstances, most caused by their greed and bad decisions. Some were unfortunate in trying to fuck around, only some of the enemy are intelligent enough. Though, I haven't finished and only read it years ago. Things might've changed in the latter chapters.
Dude has the highest strength stat and had been responsible for deaths of many, yet fuckers still charged in to try and kill him like moths to flames.