High taxes did not drive cigarettes and alcohol underground. One can grow their own tobacco and make or distill their own booze - but they don’t.
Proponnents of legal marijuana argue that if high taxes on pot are too extreme - then grow your own. It’s very easy to do.
Except they forget there would then be a need to triple the drug agents out patrolling your backyard to be sure you aren’t in possession of untaxed and inlicensed marijuana.
You’re right.