Like the story says most shelters have a litany of rules that most reasonable people would find objectionable. Some even require you to attend religious services, or preform some other act.

Then you have the one that refuse pets (homeless people will not and should not have to give up their pets)

then you have a Single Sex only shelters where couples would be split

Then you have the fact that in many cities there is an extreme lack of Men's shelters as most of the funding goes to Women and Children shelters.

I could probably list a dozen or more other facts more than "the damn homeless just refuse help"