This is very true.
I watched a video of Jordan Peterson recently where he was asked by the interviewer that was clearly upset by his stance on matters, what gives HIM the right to comment on these matters about people and their outlooks, and I loved his response.
He said, he has studied his whole life on the matter and is a professor on the topic material, interviewed literally thousands of patients and discussed with many professionals.
THAT makes him authoritative on the matter!

Having an opinion is just that...an opinion. I trust someone that has taken the time to research it with facts, than some over zealous zealot.