Addiction is a sickness. Educate yourself. Addicts don’t make rational decisions. Draconian punishments don’t stop them or give them pause. The US tried this for decades and it’s been a colossal failure in every way imaginable. Addiction is mental illness. If you really care about reducing the problem of drunk driving and other destructive addict behavior, and not just about sating your own need for outrage, then you’ll advocate mandated treatment and rehabilitation.
I’ll even help get you started.