I like drugs, I do drugs, I know a large amount about them because I like reading about them.
Drugs, like all things, are a tool. They are not good or bad in themselves, it all depends on what you do with them.
I don't want to shoot a dead horse, but in case someone here never actually thought about this topic, the categorization of "legal substances", "pharmaceutical products" and "illegal drugs" is absolutely arbitrary.
You will never bat an eye if someone takes recreational drugs on a weekly basis (alcohol), you do not mind if your child is given powerful stimulant amphetamines to take on a daily basis (like Adderall), but you are shocked if someone does something like mushrooms, LSD, or MDMA occasionally? It's on you.
Drugs, like most things, can be destructive. From alcoholics that do so legally, to pharma-prescribed opiate addicts, to the pothead that destroyed his willpower and discipline by doing cannabis legally all the time, to the crackhead that does illegal cocaine whenever possible.
You can do drugs of all types (yes, you can do meth occasionally for recreational purposes without any danger if you know what you're doing) without harming anyone. Plenty of people do that, I do that. But you never hear about those people, only about the junkies and those with addictions that ruin their own lives and the lives of others. It's a sample bias.
In short, drugs are a neutral thing. People should be educated about them in order to lower the probability of them falling into traps they could've avoided otherwise, and much like alcohol there should be pressure onto people about how "we all agree that's it's not a good thing per se, but if you want to do it, you can, but tread very carefully, people stronger than you perished in the hands of substance abuse".
And don't get me started about how food is the most common substance abuse there is. America is a country of addicts to sugar. Take sugar away from an obese woman and see if she acts differently than a crackhead in withdrawal.