Mostly yes. I hate any lawyer who would give a plea deal for a habitual offender. And Nelson sure fits that description.
Pot has a strong enough hold on it’s users that many of them can never return to being a law abiding citizen again once they start using it.
Even in the military and other jobs that test for drug users, the addicts cannot stop themselves and they lose their careers.
One way to measure if an illegal substance is addicting, is to see if people will trade their careers for it and can’t make themselves simply give it up and move on.