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.
Sorry but I disagree. When I had group therapy all I did was compare myself to others and thought my problems "weren't as serious" (they definitely were) as others; I didn't get the kind of attention I needed. Also, other random people aren't usually equipped with the tools necessary to be able to help people process their trauma. Under capitalism there are some things that therapists simply won't be able to solve, but that doesn't mean it's useless.