And it's not even about cost of living if you really get down to it, it's about inability to adapt to the pace of having so many options, that you choose to have fewer, or preferring a slower pace and less options, which is fine.
But the homeless situation has been dramatically affected by positive changes, so no. There are plenty of families, many types of household, so no. And people generally move away from San Diego entirely, not just downtown, if they leave. It's an overall lifestyle change usually. San Diego as a whole is speeding up, and the cost comes with benefits of being here.
But like I said, if it isn't bias, it's preference, and preference is fine! The bias though, is flawed.
( Major edits since downvote since apparently I needed to spell out exactly why this is biased thinking, not just question the bias. This is really unfair to San Diego which is not perfect, but extremely progressive. We've dealt with the majority of the charges rapidly. Check your assumptions and refactor your thinking please )