Crack is unusually addictive but many people maintain casual cocaine habits for years on end. Both of these drugs have the same classification, and the same penalties in most of the world.
Crack is also particularly bad for your health outside of just being extremely addictive. If it wasn't a Class A drug people would rapidly end up in treatment for it anyway.
Ultimately there's hardly any actual science involved in the War on Drugs, just as there wasn't during prohibition.
There should be evidence heavily involved in a war on drugs, on a drug by drug basis, for sure. I'd estimate the totality of the drag on society, even parenting, in determining the resources to apply to reduce the usage of that drug.
Crack is also particularly bad for your health outside of just being extremely addictive. If it wasn't a Class A drug people would rapidly end up in treatment for it anyway.
Ultimately there's hardly any actual science involved in the War on Drugs, just as there wasn't during prohibition.