Let’s not exaggerate here. I’ve been to Golden Gate Park many times in recent months and it is bustling with activity. It’s also a massive area. People are not scrambling over encampments or wading through needles to access most public spaces in the city (though there are certainly some hot spots).
The problem with trebuchets though is that the trebuchet makers are less well connected politically, so there's less opportunities for graft along the way.
You ask for compassion, yet give none.
Have some compassion, then you might qualify for some.
For things to be better, we need to start doing things differently, and one starting point is to have compassion for the people who are denied the use of public spaces by the hardcore homeless who refuse outreach and aid.