I have a therapist now that I've been seeing (well, listening to over the phone) for a year. Usually every 2 weeks. I think having a real person I can talk to about my problems helps, but it helps in a way that is hard to explain. I haven't really gotten any practical
help from my therapist (she hasn't solved any of my problems) but I think the feeling of emotional support is important at a physiological level. I think not having any IRL support creates an additional strain on the body, since being socially isolated is dangerous for a person at an organismic level and the brain is always trying to get you out of danger. The catch is that it has to feel genuine or it doesn't help.
As far as personal development goes, one of the reasons my therapist hasn't been able to help me practically is because I've read so many self-help books, and so much in the area of psychotherapy, that she can't really tell me anything I don't know. I already meditate and use CBT to reframe, know how to manage my OCD, and could write a book about self-compassion, lol.
My personal opinion is that the world needs a sort of 'emotional/psychological support service industry'. I'm not just talking about more trained therapists (though I think we need more of those) but just a much more supportive system in general. It's too easy for people to wind up isolated and alone, especially these days. People could even be paid to provide peer support as untrained (or minimally trained) listeners, responding to posts like we already do for free on SAS. I think this site would be a lot more supportive if there were people being paid to offer support. There are phone help lines for people in crisis, ofc, but it would be nice if we could help people avoid reaching a point of crisis in the first place. This kind of support becomes increasingly important the older people get, because it becomes increasingly hard to make friends (especially if you have mobility issues), you eventually retire, and old friends and family pass away. Isolation is a huge issue for the elderly population.
Ofc, I'm fairly cynical, so I think we're more likely to see this kind of support being offered by robots in the future than people. Because you can sell a robot but you have to pay people to provide real human support. But when all the industrial, transportation, and service jobs are finally gone the way of automation, I think that's the biggest place we're going to find new ones.