You really need to better qualify what you mean by "often" and "many." If 90% of homeless people would be able to make meaningful use of direct cash donations,

You really need to better qualify what you mean by "often" and "many." If 90% of homeless people would be able to make meaningful use of direct cash donations, would the remaining 10% be reason not to take that action? I mean, I'm just making numbers up, but you aren't even doing that.