Yeah, I'm not afraid of cops, but I do recognize that people they pull over often try to shoot/stab them. So it's about their fear of who is in the car and what they are doing, imho.
I have too many stories to go into here, lol. I wasn't always driving
I've told my arrest story a million times (most polite person they'd ever arrested, got to pee in the cop's bathroom at the jail, got used for a trainee fingerprinter because I was so nice, had a bunch of laughs).
The scariest stop I had was with my brother driving on the highway between Baltimore and DC (speeding). That highway patrol cop was badass. I was lying in the back under blanket sleeping, and he didn't like that one bit. It was just in his demeaner, but he used his flashlight, and I sat up and un-blanketed myself without him having to say a word. I should have done that a few minutes earlier. They must see some rough stuff there (obviously).
My brother is very good with cops and military folks at remembering to say sir, so that was good (he has long hair and religious Muskogee tattoos on his wrists and arms, btw). It was a big, tough Black cop, and he was quite good at being intimidating! Good for him, given where he patrols.