How does that work when nicotine products that are every bit as addictive as tobacco exist, maybe you're just not aware of them? Sitting here with non tobacco snus (Swedish nicotine pouch) under my top lip, something I have been utterly unable to quit. I believe "nicotine free" tobacco would be completely non addictive.
tobacco contains MAO inhibiting compounds, which potentiate nicotine and increase addiction potential. that doesnt mean nicotine on its own isnt insanely addictive, i have no idea what the guy youre responding to is talking about. however, MAOIs were withdrawn as antidepressants for a good reason - they have a terrible withdrawal all on their own.