But in the US, which does not have public healthcare, the burden "to bear the consequences of consumption" does already fall on the individual in those cases.

This pro-prohibition argument is more impressive when made in countries that do have public healthcare, although it still falls short when trying to explain why doctors should mend bones that people break while engaging in some high-risk activities (like skiing or mountainbiking), but should not heal ailments that people incur while engaging in other high-risk activities (such as smoking).

Banning drug consumption in public spaces, where they might harm others, is a different issue, and the drug that is most problematic here - tobacco - is in any case one of the least restricted ones.