Which is why, in the comics/cartoons, when Superman comes up to a really bad villains, he states that he no longer has to hold back.
Fights against Mongul, Darkseid, General Zod, Doomsday, it is FULL POWER.
I recall once Superman stated he had to fight on eggshells when he goes against not so powerful foes.
With so much power, he might break instead of just stopping the criminals.