Cops certainly are interested in enforcing laws that are important. But they don't go out of their way to harass people, and almost all cops are chill.

For example, in Kyiv, I once blew through a red light in a dangerous way right in front of a police officer while on one of those rental electric scooters. The cop lite up his lights, and pulled over in front of me. I just apologized and said that was dumb of me and I shouldn't have done that. And that was that. No ticket.

Equally, I've gone through a lot of military checkpoints going to and from areas close to the front line. They rarely actually ask what I'm doing, and only occasionally check my documents; I've never actually had my stuff searched. They certainly could do that and there's good reasons for those checkpoints. But they don't go out of their way to harass people who are clearly there for good reasons.