Quitting smoking is matter of willpower

As the title says, if you can’t quit smoking it means you are lacking conviction or willpower. Countless people have quit cold turkey. I understand there are varying levels of addiction between individuals however, it comes down to who is strong minded and who is weak willed. The (very) extreme analogy I will use when people say “I can’t quit” is that if I told you with 100% certainty that your family/spouse/children would instantly die if you ever smoked again, then you would stop. The desire to quit exists, but the weak minded can’t commit to it.