Alcohol in powder form, in clear bottles, in small bottles, in plastic bags--will still be just the same; namely a substance which most people can take or leave, can use responsibly.
For a fraction of people, it will be able to set off a powerful process of addiction, craving, obsession, self-destruction and near insanity.
If you be in the first group, enjoy the pleasures.
If you be in the latter group, stop drinking and get back the life alcohol took from you.
Preventing people from getting powdered alcohol will have no material impact on the issue, whatsoever, anymore than Prohibition stopped people from drinking the then-illegal stuff.