That's false.Yet being intoxicated is not accetable culturally and lawfully. Drinking alchohol is up to the individual, and the consequences with it. If anything, your takeaway should be that the society is not capable of responsibly consuming alchohol, and legalizing more drugs would not lead to good outcomes.
Legalizing cocaine likely could have prevented these deaths, so I'm failing to understand your second point. Banning substances create black market solutions with no regulation which lead to this the subject of this thread becoming commonplace.