Superman was also very high-profile. He easily held up cars, planes, rockets and buildings, but that was mainly to save people.
The Dark Knight, however, was a little different.
He appeared at violent crime scenes every time, but not as a CSI member.
Regardless of whether the offenders were about to commit a crime, or were in the middle of carrying it out, or it was after the fact, the moment they showed themselves, Knight would beat them up, rescue and treat the victims, and call the police.
He didn't leave until the police arrived. Every time, the police officers would see his fluttering cape gradually change color before he disappeared into the night.
Superman liked saving civilians more than fighting crime.
The way Knight appeared and crippled criminals was undoubtedly very ruthless.