However, from a third world entrepreneurial standpoint, I can see how this is a great business opportunity(?) / disaster waiting to happen. Quick, someone make an iPhone app.
I've read that in Australia there are heroine addicts on whom everyone has given up hope of rehab who have normal, janitorial jobs to pay for their habits. They get the horse from government sanctioned farmacies at low cost.
But I'm also reminded of the old Richard Pryor joke: cocaine is God's way of saying you make too much damn money.
I hope your friend got some help.
They already did:
Sounds like an ad hominem attack by impeaching the motives of the speaker. The implied message is that the speaker is biased against cocaine much more than other drugs so his judgment is not to be trusted.
Not such a good tactic.
EDIT: If this was an honest question and not sarcastic I apologize for misreading the tone. The internet is a tough medium for nuance.