> If one opinion is important, it will like the shared by more than one person.

Sometimes nobody else shares the opinion and the “abrasive person” is both good-hearted and right in their belief: https://en.m.wikipedia.org/wiki/Ignaz_Semmelweis

Personally, I’d rather be the kind of person who could have evaluated Semmelweis’s claims dispassionately rather than one who reflexively wrote him off because he was strident in his opinions. Doctors of the second type tragically shortened the lives of those under their care!