Why do you say that you should never associate with people who quit smoking successfully? Is this sentence reasonable?

Most people probably can't quit smoking, because they don't have such strong willpower and good self-control, so most people who quit smoking will relapse and become addicted to cigarettes again.

Therefore, people who can quit smoking will be people who have good restraint, can be hard on themselves and can tolerate the temptation of smoking.

But they can't associate with them, just because they can be hard on themselves and overcome the temptation of smoking, so some people think they are hard on themselves and even harder on others.

However, if you don't want to hurt each other and are afraid of revenge, then such an idea is nonsense. And if someone really thinks so, they should first consider whether they have any shady bad ideas.