The majority in the US also support a small, but very costly minority, that are not assuming responsibility for their own health, regardless of age. The obese alcoholic diabetic with all kinds of associated illnesses, from cardiac issues to renal failure causes every member of an insurance risk pool to have increased premiums. Avoidable healthcare conditions are responsible for 30% to 40% of all healthcare expenditures in the US - obesity is the biggest of these conditions.
I was responding to David's over-the-top statement regarding what's currently being asked of young people in this effort to manage the COVID-19 outbreak.
For what its worth, there's plenty of evidence that would challenge the notion that alcoholism is an "avoidable healthcare condition", but that's probably a discussion for another place.