Intelligence work is done largely in offices. Phone networks, data centers, etc.

In field operatives wear plain clothes and use “behavioral engineering” to get information. They just try and get people to talk more than they should through friendly conversation.

The fighting doesn’t happen. Its reckless, draws attention, and no one is going to tell you anything after you’ve beat them silly.

Homicide detectives also do not get into alterations because the altercation has already happened. When they get enough of a lead on someone they notify dispatch and they send a pair of officers to pick up the suspect.

Real life does not have fisticuffs.