[LarsDu88]

We do in fact prosecute drug dealers. In fact, if anything China's opium problems of the 19th century were ended by communist cadres mass executing drug dealers (and some users) in the 20th century.

Many countries have successfully cut down sugary drink consumption through regulation.

Where to draw the line is a matter of policymaking decisions and its not black and white. Its a very gray area that needs to be tuned carefully by society.