Well, yes & no. And I think the author, in his selection of sources in this rather subjective piece, somewhat proves this.
Physical addiction exists, in my view. But the missing component has been the "cage" as he phrases it.
I guess my own cage must be pretty weak or non-existent, and same with my husband, because neither of us have either been addicted to drugs. Despite having taken some pretty heavy ones for injuries & surgeries.
When the pain went away the drugs went away, along with any thoughts about them. Taking them was a burden, why would we take them after their job was done? I guess we're just kinda happy & content guys.
Nor do we think of drugs as recreational. I still haven't smoked marijuana in my entire 66 years. Simply don't care about it. Nor does my husband.
Alcohol is a drug, which my husband takes rather seldom, maybe 2 drinks a week if that. I drink more than him, and like to make jokes about my occasional buzz (which ultimately gets me in trouble in hostile places like RJ with the homophobic Right Wing vultures here).
But sometimes I go weeks without drinking, and don't really miss it or have withdrawals. For me it's just a social activity. Nor were any of my family addictive, except maybe my Mother with cigarettes. I do believe nicotine can be physically addictive to some people, as I think it was to her, regardless of any "cage".
So I mostly would concur with this author's views, though with reservations.