The difference of course being that the laws against rape, robbery, burglary and murder are laws against you doing things to other people; while laws against drug use are laws against you doing things to yourself. Vast important difference there. Once you decide the government has a place deciding what you do to yourself you’ve opened a very dangerous door, one very similar to socialized medicine, it’s the same door that we now get bans on “too much” soda from.
Is that why we have DUI laws?