Thanks for actually linking to stats. I've been to San Francisco, it's not as bleak as the anecdotes folks constantly try to put on it. One of my favorite cities to visit.
There are all sorts of stats and data out there. finding accurate information is very hard. Most counties have HMIS systems but many are not well maintained which tends to lead to very inaccurate data reporting.
There is also the issue that the moment a person arrives in California and sits on the pavement they are considered a 'resident' by many of the data capture folks, many of whom are pursuing ideological agendas.