If only life was so simple that many folks who end up in prison could have just picked a life of work rather than crime. For most first timers in prison it was a dumb thoughtless action not a serious selection like in some high school career day. It isn't as if the line for Judge, Jury, and executioner was too full so the guy picked repeat felon.
Not saying there are no bad apples but making blanket statements is best left to the old curmudgeons who think they know all...
While the old heroin comes on the heels of pot song is the traditional 'example' of the death trap blowing a doobie can be, these days most harder drugs come from GrandPa's medicine cabinet not from overseas. This isn't the 70's. Rush Limbaugh knew exactly how to get his oxycodone, and if that old fat holier than thou could figure it out anyone can.
Legal or illegal, people who want any drugs can find them. Bet within two blocks of where anyone lives these days there is at least one person who knows where, and for how much. Bet within a block there is at least one dealer/meth lab/convict with a drug conviction.
War on Drugs has been going on for most my adult life, can't says I can see any progress or a victory parade in sight.