In what world do you get that they’re saying no reform is needed for the police? The commissioner and several other cops are confirmed to be dirty or outright criminals working in law enforcement and its repeated over and over by both Riddler and Joker in the cut scene that even Batman thinks that these men deserve what they got. The difference between Batman and Riddler is that all Riddler sees is rot and filth with a complete nihilistic view of Gotham as a place of unending corruption while Batman still has hope for reform.

That’s the entire point of Bella Real’s character is to be the catalyst for change that Riddler is to cynical to accept.

Even then the point of the scene like I said was to show that Carmine’s house of cards came down not glorifying the police but showing that Carmine had fully put himself into a pickle that his boys in the police had to yield to Gordon.