No one absolutely, positively, no-possible-other-options "has to" do anything ever. People make decisions on a spectrum and at the margins. There are people who

No one absolutely, positively, no-possible-other-options "has to" do anything ever. People make decisions on a spectrum and at the margins. There are people who never drink ever. There are people who drink every night but would never drive. There are people who drive drunk every single night. If you make it easier to get home without driving drunk, some people that otherwise would've gotten behind the wheel will make the responsible choice.