Anecdotally I've been to therapists and doctors that were no help and I've read an article online [1] which was a tremendous help.
[1]: https://kajsotala.fi/2017/07/how-i-found-fixed-the-root-prob...
Anyway in discussions like this I feel like what it lost is that you will actually respond to how compelling the thing someone else is saying is. Like, it's not "oh a bunch of opinions, I'll get influenced by one randomly and it's probably wrong". It's "oh, a bunch of opinions, which explain why they think they're right and how well it worked for them, I'll incorporate that into my own understanding".
I've found they're more often than not ignorant of the latest studies, as well. Doctors are put on a pedestal in our society that very few of them deserve. A solid 2/3s of the ones I've seen are over-confident, dismissive, and often peddling out of date information. The rare ones that truly focus on their field and put their patients above their egos are difficult to find and even harder to get to with average US insurance.
And you think a random stranger knows any better? I know firsthand that the medical profession has serious limitations in its understanding of and ability to treat depression, but no way in hell am I taking some rando's advice over that of any of the many doctor's I've seen.