I guess where I'm coming from is there seems to be a lot of effort and energy available for discouraging and even banning this sort of LLM use without remotely comparable amounts of effort and energy put into figuring out how everyone can get access to mental health care from humans.

I'd bet a lot of money that very soon we'll have LLMs that are guiding people toward outcomes as good as (or better than) human therapists. I'd also bet a lot of money that we'll never manage to actually provide access to human therapists to everyone who could use it.