As do laws against rape, robbery, burglary and murder. Would they stop if we rescinded the laws against them?
Prohibition causes more harm than good. Drug availability doesn’t stop or drop from prohibition, and the consequences of prohibition are more crime, and the destruction of freedom for law-abiding citizens.
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.