This has become much more clear in the last couple years. Demand shot way up and is far outstripping supply. Then you get into the issue of how so many patients aren't a good match for the first therapist they try, so they have to jump through all the hoops and fill out all the forms to try another one, which also may not be a good match (all while potentially on the edge of some kind of breakdown)... I went through at least five before I found one I felt was effective for me, and my experience is not uncommon.
Personally, I think we need to lower the barrier of entry for people to become therapists, and streamline the whole patient intake process. It's not like the quality is all that great with existing barriers, there are PhDs out there actively harming patients-- one kept trying to push Jesus on me when part of what I was dealing with was childhood religious trauma and the difficulties of restructuring my world view as a nonbeliever, an absolute breach of ethics.
We need to make it easier for people to try out multiple therapists until they find one that's a good match for them, and part of that is increasing the supply of therapists. Unfortunately I'm not sure a chatbot is ever going to quite do it except for in the simplest & most clear cut cases, the mental tangles we can get into really require general intelligence to grapple with.