It might surprise you then that nearly every homeless guy you see "has a place to sleep", they choose (not in the "choose to be homeless sense") to sleep outside. The main reason is that homeless shelters have restrictions on violence, drug, and alcohol use, and people make a choice between comfort hand having their buzz harshed.

Now you can follow this up with a lot of "but.." arguments, but the fact remains that in most places (not all) if someone is sleeping outside rather than inside they actively made that choice.