Can broccoli compete with heroin? Why don't we offer people both and see what they like better? Let them compete! Give people choice!
Since that didn't seem to work I'm kinda out of ideas as well
Many people have had "heroin" in the form of morphine in the hospital. They don’t turn into morphine-seekers.
Addiction and pleasure seeking is more complex than having a taste and then being hooked forever. Of course many people can't get out of this Skinner Box type of mindset.