Instead of being an industry that is regulated and controlled you have people selling these drugs to kids in school playgrounds, and shooting each other to protect their territory.
Had the government decided not to criminalize drugs but make it a heavily controlled industry, they could use the tax money for social programs like schools ad to give Americans universal health care.
Please do not misunderstand me I am not in favor for legalizing hard drugs, but the current system is not working at all, but I am all in favor for legalizing online casino gambling.