That’s what that “bad apple” aphorism means. Even if the majority go into police work to protect and serve, they eventually get corrupted by the vocal minority who represent every negative stereotype about cops.
It’s what happens when you live your life by aphorisms you don’t understand. Instead of thinking “OMG, there are bad apples, get rid of them” one thinks “eh, just a few bad apples, most of them are good”.
The former is how we should be thinking. It doesn’t matter if some cops are good, or if most are. If there are some who aren’t, they should get gone like yesterday. And the rest of the cops should be eager to force the bad ones out, instead of hiding together behind the thin blue line.
