This article on the latest Avengers issue clearly states that maybe, just maybe, Thor has the ability to prevent superheroes needlessly fighting. See this: https://www.cbr.com/avengers-thor-prevents-civil-war/. Apparently, it turns out that with him around, people have a tendency to act like adults. Whereas without him, everything falls apart and civil wars occur.
I don't know how I feel about this, honestly, First off, that is a lot to put on Thor. He can't stop every fight. Second, the Avengers are capable of getting along without him. Otherwise, they would never be able to function as a team.
However, it is funny if Thor turns out to be the moral compass of the team instead of Cap!