The main issue is that therapy is expensive, and it's very middle-class to have the money to afford one long-term like that. Working class people have had to suck it up, or (preferably) have a good support network themselves.

While I am inclined to agree that most people would benefit from having a professional to talk to, it'd need to be economically viable as well.

But we're seeing this happening in real time; on the one side there's lower cost online councelling available (but whether that's actually certified professionals is debatable), and on the other ChatGPT became the biggest and most popular therapist almost overnight. But again, not sure if it has the necessary certifications, I suppose it's believable enough. I also want to believe OpenAI and all the other AI suppliers have hired professionals to direct the "chatbot as therapist" AI persona, especially now that the lawsuits for people losing their sanity or life after talking to AI are gaining traction.