It's been my experience that most mechanics ironically know next to nothing about oil and oil filters. That isn't to say that there aren't some who are in fact knowledgeable about them, but MOST know very little. I would bet on it. I've had more mechanics tell me wild stories about oil and filters than factual information. Same with machines I work on that come from other shops. I had someone bring me a snow blower that was difficult to pull over when it got cold out. You guessed it, his "mechanic" told him to fill the crankcase with Lucas oil stabilizer.
I would say the funniest have been the people who cut open Fram filters and say the fiber endcaps are "junk cardboard" that shouldn't be used in anything. At least their ignorance is easy to spot.
"Mr. Subaru" on youtube is an actual mechanic at a Subaru dealership that loves to do oil filter cutups and give his opinion, based on nothing, about whatever. Someone sent me an hour long video he did "analyzing" several filters which was primarily him trashing the Subaru OEM oil filter and Fram products while pumping up Wix products. He said barely anything about the Fram Ultra and really didn't talk about any filters performance. It was all superficialities and "cardboard" endcap bashing, next to no actual substance.
But he is a mechanic and he has a platform to speak from so even if what he says is ridiculous or irrelevant he'll get a lot of people believing his bull