I know you're not saying the government should fully regulate everything, but I see drugs used to demonstrate need for government intervention in people's choices despite drug policy being perhaps the most visible and painful failure of such paternalistic policymaking. Namely because it hasn't protected people from themselves, it hasn't treated anybody's addiction, it mainly just creates violent black markets and saddles nonviolent offenders with a permanent criminal record.

Cynically, I think the real purpose of these laws always looks more like protecting entrenched interests rather than helping people who would get better if only they had some legislator making their life choices from a thousand miles away.