Drugs are only bad if you overdo them. Every culture ever has some intoxicant or drug. It's kinda built-in to us as a species that we like that shit. And it's not just us. Cats like catnip. Bears love eating fermented berries and so on and so on.

That said a lot of the actual problems with drugs stem from capitalism. Needing to make money from drugs led to infinitely better drugs which are infinitely more addictive. It also leads to dealers cutting their product to sell more of it. It also puts people in prison because not the right people are making the money off of the drugs so they are bad now.