Well, yes and no. It depends what you mean by "help".....
My husband and I had couples therapy many years ago. We'd been married for 20 years already and I thought we'd got a solid relationship, but it all went wrong. We couldn't really work out how it gone wrong, every time I tried to discuss things my DH didn't want to talk, he'd literally clam up and just walk off.
My DH was in a job role which paid for us to have counselling, we were able to choose a therapist, we chose someone who was (at the time) relatively well known (they had written books on couples therapy) and therefore I believe they were quite experienced as a therapist. DH would not accept a female therapist as he thought they would be "on my side" as he put it, I was just willing to accept anyone who might facilitate talking and working through things.
I assumed a therapist would enable us to see each other's point of view, help us start talking to each other and slowly make compromises to build our marriage back together. It didn't happen that way, so if that was the goal, no, it didn't work.
But as we went to sessions I started to see DH in a different light. As DH began to trust the therapist more, he began to reveal his real thoughts on our relationship.....it was an eye opener. On our final session the therapist asked us each to talk about our ideal future together, how we'd be with each other, what we'd be doing, how our 'perfect' relationship would look and so on. I said all the things I thought were normal....sharing things together again, perhaps travelling, being 'in love' again, working alongside each other.
My DH outlined a completely different picture. It was all about him....how he would advance in his career, move house/area, gain promitions and so on. When asked about my own role in this new life, DH had to think before saying I'd be "pottering about somewhere in the background", perhaps keeping the house tidy (!!) and gardening??!! I didn't feature in his life at all, he seemed oblivious to the notion that I might share in his future.
I would have never have got this information without the therapy. It made me realise I would never have the marriage I wanted, it was a 'dream' which wasn't going to happen for me. It hurt but it was a lightbulb moment; we stopped therapy and and I filed for divorce immediately. It wasn't the outcome I expected or wanted but it showed me clearly what I should really do and gave me the courage to do it. It was very hard, I had to let go of my own hopes for the future but I haven't regretted that decision.....DH became ExDH and I have done many things with my life subsequently which would not have been possible if I had stayed married.
As I said at the start, it depends what you mean by therapy "helping".