By contrast, the visible homeless are a visceral inconvenience, even a danger, so people feel strongly about how that problem is addressed. As a smallish woman, I am on high alert in certain areas of San Francisco, Oakland, etc. I'm not all that likely to be accosted, but if I ever am, it will be a big deal, so navigating those places is nerve-wracking because my threat-detection is constantly dialed up.
I would compare it to, like, road planning versus traffic enforcement. The former has far-reaching, long-term impact (like housing policy) but the latter is what gets people heated, due to the immediate impact in their day-to-day lives.
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Full disclosure, reposting a comment from a similar thread: https://news.ycombinator.com/item?id=33961731