Is there any science to back that claim up? First time I've heard that and it very much sounds like pseudo-science made up by "war on drugs" people.
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EDIT: There seems to be a similar claim made in some review papers[0][1], though those primarily focus on hard drug abuse. Would be interesting to get the opinion of someone more qualified on the topic.
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Either way, interesting article and at least that interconnection of weak addictions is nothing I thought about like that before. I think I might even try out that advice, as I'm currently struggling with strong procrastination (hence me commenting here) while coincidentally my weak addictions recently all had a bit of an uptick.