I'll answer my own questions. About four times, as with every article about addiction, I started to ask "Can't they just...." ...and the answer always is, "No, they can't". For some good reason. Because all the "simple" solutions have been tried and tried, by people of good faith and intention.

Letting Garth Mullins solve it, reminds me of that scene in Wargames: https://www.youtube.com/watch?v=7FogV4Qv8p8#t=19s

(For those under the age of 50, a "spark plug" was an automotive part with a high voltage point on it.)