You also pretty commonly hear the opposite, too, though -- that there are too many sobriety/no on premise consumption rules that people are unwilling or unable

You also pretty commonly hear the opposite, too, though -- that there are too many sobriety/no on premise consumption rules that people are unwilling or unable to comply with so won't even consider shelters assuming that to be the case. I think you're right that tracking those better and better communication of what's available are both needed.