I don't get why therapy's supposed to be the fucking cure to all mental illness

I swear to god I'm trying my hardest and I still have nothing to say. Maybe I'm unfixable. I've tried so many therapists.

edit: I wrote this when I was really upset after having to cut a session short due to having nothing to say and not clicking with a therapist. Thank you for all the responses. I see this resonated with a lot of people. Maybe "cure" was the wrong word to use but I meant to convey that I see therapy suggested as first line mental health intervention all the time and it seems like it just doesn't work for some people, which is frustrating.