"Dumping ground" implies other places did this to CA, which isn't substantiated by the article. As it says, the vast majority of CA homeless are from within the state. In the cities of CA, as in other rich cities, homelessness and high housing prices come from the same problem: prohibitive regulations on housing construction.
I'm really not convinced that high housing costs accurately depict the source of the homelessness problem in CA. If it does, it certainly isn't describing the homeless people I see. Most of the homeless people I see, the ones who are literally pitching tents on the side walks, sleeping on boxes, defecating anywhere and everywhere, passed out on park benches at 3 in the afternoon, are almost certainly not going to be…
I agree that this doesn't solve the problem for everyone, and there's also a place for publicly funded mental health hospitals. But I also don't think everyone who is currently homeless in CA is in as bad shape as the ones you most notice.