When people talk about "therapy" here, they most likely are thinking of bog-standard talk therapy, where you just go in and kinda, well, talk to someone about your life, problems, etc.
For some people, it's enough to just get things off their chest, talk about things out loud with someone and helps them deal with their issues. I personally see such a therapist monthly and find it beneficial to my mental health.
For others, especially those with more intense troubles and traumas, it may not be, and would probably be served better by someone more specialized with said traumas.
Like any medical profession, the quality of individual therapists and mental health experts can vary widely, from chuds to libs to comrades and everything in-between. there's a solid chance you may not get the perfect fit on try 1, I didn't.
I just feel like some people are dipping their toes into Scientology-ish "all therapy is bad, never seek professional help for your problems" stuff, which I think is disastrous advice.
I have mixed thoughts on therapy, I started it a few months ago (my health care provider offered me free therapy, yippee) and the most helpful things my therapist has done for me is recommend me books that go in depth into a subject.
There are some things I could never tell my therapist bc I know they'd try to "fix" me (namely the fact I'm plural), and dealing with that would probably do a lot of harm. I can't tell them about any self-harming thoughts because I'll be institutionalized. But it has been helpful to work through understanding my abusive relationship, how to deal with anxiety, how to navigate my relationship with my parents in a safe way that won't get me kicked out, etc.
Basically I don't know everything about the world or myself and having someone tell me what they know is useful, but the interactions also inherently feel somewhat adversarial because of the aforementioned reasons, which limits the effectiveness. I sure as fuck wouldn't pay money for it, lol.