The word craving doesn't exactly have a scientific definition. I have "cravings" for chocolate, and yet I can refrain from eating it for long periods of time and we don't generally talk about people having chocolate addictions unless they are eating absurd amounts of chocolate.
All I can tell you is I was in civics class (yeah, high school, back when we rode dinosaurs

) when I had my first "nicotine fit". I knew
exactly what it was and what I wanted. And I wanted it very, very, very much. And that was early on. Like the first week I ever had a cigarette.
First I can sympathize with the nightmarishness of quitting smoking. Indeed vaping only worked for me too. However I think that has to do in part with being addicted (I didn't bother to attempt quitting before I started having health consequences of smoking) and in part because I derive great benefit from nicotine (I have ADD, and it helps me concentrate--ADD is usually treated with stimulants).
I am so addicted to nicotine that I had resigned myself to the health consequences. Whatever they were. Cancer didn't sound that bad up against those quit attempts.
(Bet you think I'm kidding. I'm not. If they take vaping away, I will smoke. End of story.)
Second, I want to see these studies. There are hypothesis out there that there are certain genetic markers that would lead one toward a nicotine addiction, however, these genetic markers are both quite common and not everyone smokes or uses nicotine.
Well, see, I remember reading about those studies back in pre-Katrina New Orleans and I probably squirreled the papers or articles away but I had an actual office back then which did not make the transition gracefully. In short, I could be digging until my first Social check arrives. So I'm not much help there.
Still, it wasn't "pop sci" crap. I've always been something of an academic by nature and was doing post-grad work in anthro at the time. Didn't have much use for the popular press. About the closest I got back then to "popular" publications was SciAm.
And predisposition
is just that. Predisposition is not predestination. The ANTZ may want to oversimplify and use the research as a club as they seem to get some weird emotional satisfaction out of "punching downward" and need somebody to look down on but genetics is more complex than that.