Don't follow the logic, but we are not "enabling", unless you count helping someone to survive as that. The "enabling" idea assumes that homeless people are criminals or prone to some kind of self-destructive lifestyle, which is not the case with most. They're poor people who don't have enough money to get into an apartment. 

The bigotry involved is all the ideas people have that "enable" them to look down on the homeless and keep them that way. Ideas that are not supported by reality.