You're both right
There's just no blanket categorization of LEOs these days. There are some truly great ones and some truly awful ones. As in any profession. (Except lawyers...all great

)
When you think about the amount of constitutional and case law protections for state agents...and then on top of that protections against municipal liability...it's a lot harder to sue law enforcement than it could be.
I say could and not should, because I agree that these ladies and gents put their lives on the line for us every day. No matter what rank. No matter where they are geographically. It should be hard to come after police/sheriffs/municipal appointees because they exercise discretion...and no human gets every decision right.
That being said, there are lots of situations where cops do have situational knowledge that, if you aren't involved, you wouldn't know about. And where they use that knowledge to take short cuts that end up in real damage to real people "because they know better."
You can't have it both ways. You can't get tons of protection for discretion-making then abuse your discretion and protect yourself behind the blue line.