In that show, they’re actively going to visit what they believe to be a child, privately, in person. And discussions leading up to that point often make it clear their intentions of what to do when they get there are sexual.

We don’t know what is in Doc’s comments. He says it was inappropriate and crossed the line, but no images were shared and no attempt to meet privately.

There is a difference, and likely why there was no police involvement. Inappropriate comments aren’t by themselves, illegal. Otherwise half the internet would be in jail.