Pros: You can feel less alone with your struggles, you can understand yourself better, you can work to solve things that are keeping you stuck. For me the biggest pro is that I feel seen and accepted by another human being. It was new to me and I feel like a different, better person because of it.

Cons: You have to take the risk of starting a new, honest relationship with another human. You might not be a good fit with the therapist, which means taking the risk to try another one. You might dredge up things that are painful (but aren't they hurting you anyway?).

I struggled on my own for a long time. I tried a couple of Ts in college and it was a greater risk than I was ready to take at the time. I do think that therapy is worth trying, more than once, if you are struggling.