Well in my personal opinion some drugs, if used in moderation, can be a good thing. For example I see nothing wrong with someone who chooses to use acid or ecstacy once a month at most. As long as you don't let the drug consume your life and interfere with your day to day things (Your job, your family, etc.) Now I do understand that there are drugs that have a high potential for abuse (cocaine, heroine) and there are drugs that are on the complete opposite spectrum, like marijuana. I see absolutely nothing wrong with someone using drugs. I think everyone has the right to choose weather or not to use a drug and they shouldn't be thrown in jail or prosecuted for choosing to do so, the government has no right to tell it's people how to live their lives.
And about the whole "marijuana is destructive" topic, it really is not. People just need to accept it.
P.S. sorry for the grammatical errors/ typos, I am extremely tired haha