How being a Police Officer changed you?

Recently watching YouTube videos of US Police dealing with offenders(e.g.,drunk drivers, murderers, sex offenders) and I’m shocked how professional they are in dealing with them, regardless how in-denial they are.

I personally think anyone else would have already lost their shit and either screamed or bat them down.

But, I think they go through a lot of these difficult moments to reach that point.

So, wondering if any ex-Police officers here can share your experiences?

I think you dealing with the same thing is a great skill for keeping calm in very stressful situations.