Drugs Are Good: The Empire’s culture has no problem with hedonic, et. al., drugs. You have, after all, the right to do anything you want to yourself, and really, they’re no worse than any other form of entertainment.
Especially since you buy them from legitimate businessmen, not “legitimate businessmen”, scrubber nanites let you sober up really damn fast when you need to, standards of quality and purity are maintained, and advances in medical science have abolished addiction and practically every other harmful side-effect imaginable, and along with creating lots of more selective, more entertaining, less awkward/harmful/etc. designer drugs.
Better living through chemistry, man!