My experience has been that most "expert" therapy blog posts, here on PC as well as on psychologytoday, frankly suck. Not all of them, but most that I have read. One thing that's really easy to do in that kind of bite-sized article is to take one particular concept and make a general truth out of it, without any supporting evidence at all. I regularly* read in such blogs/articles that "everybody thinks/does/wants x" when x is something I have never thought, done, or wanted. That doesn't mean that I am different from everyone else, it just means that the writer gets carried away by their own particular world-view, and applies it to everybody without discrimination.

Given the choice between your therapist who knows you, and some stranger on the Internet who was paid to write a pop psychology piece and who does not know you, whom does it make more sense to trust?

*Not really regularly, because I have mostly stopped reading these things. But it used to be true.