Even in Newsom's own statement he still says they're attempting to clear encampments. The reason they cannot clear encampments is because, by Boise, they do not have enough shelter. Altering Boise (which is what he wants to do) would enable them to clear encampments even if those people had no place to go. The California government is asking for carte blanche to take homeless people's possessions whenever they want, even if they have nothing to offer them. I don't know in what world that has their best interests at heart. It seems to basically mirror Republican policy.
You're acting as though the Democrats are not willing participants in making homelessness illegal, but then linking to an amicus brief where they're begging the Supreme Court to let them do just that.
And a short aside about your Trump v. Anderson comments. The Supreme Court made their ruling only as strong as it needed to be to accomplish their goals. This is basically a hallmark of the Roberts Court. If they thought there was any threat from the legislature to actually ban Trump from running, the ruling would have been more expansive. The Supreme Court is Lucy holding the football and you're Charlie Brown thinking this time you've got a chance.