It's the same with personal health choices. You don't just die in a vacuum when your health decisions come home to roost. Rather, you take from finite, shared medical resources. For that reason, "my body, my choices" isn't as bulletproof as it seems at first glance.

I'm reminded of all the people who weren't allowed back into evacuation zones during the latest surge of forest fires to save more belongings from their house. People invoke the reasonable point of "I should be able to make that gamble if I want" but in reality, if they were to find themselves in danger, they'd be squandering resources of emergency responders having to save them and the attention of other people who should be working on evacuating swiftly rather than saving their neighbor.

It's not always obvious where to draw the line when concerning ourselves with the actions of others.