A simple question to those afraid of regulation : why does a country agree that some substances should not belong to the market (drugs) but that not letting jun

A simple question to those afraid of regulation : why does a country agree that some substances should not belong to the market (drugs) but that not letting junk food be sold in the most cynical and manipulative way to a population dying of diabetes would harm the sacro saint wisdom/freedom of market ? Sidenote : regulation doesn't mean banning, just tax the junk food heavily so the most vulnerable don't buy it and have clear markers it kills your brain cells just like on cigarettes & alcohol.