This is a classic straw man argument, but in my opinion, yes they should be legalized. The demand and accessibility are relatively high regardless of the substances being illegal. Eliminating the manufactured black market will bring crime rates down dramatically. Drug addictions should be treated as medical conditions not crimes.
Meanwhile, in my quiet home town, blow and heroin are the biggest problems. Weed is a thing of the past. You want to legalize that **** too? After all, the war on drugs isn't working.