"The Buddhists think you don’t quit addictions, you become a new person who isn’t an addict." This is such an amazing quote
You become a new person moment to moment and even „you“ is not putting it correctly and everything is tied together by cause and effect regardless.
Perhaps a better way to look at it is that the Buddha is only teaching by skillful means. So that quote may be the right thing for a particular addict at a time. In that sense it is true, but not as an absolute truth for everyone always.