My advice to you… Get another Doctor, one that isn’t called Dr Nick, who didn’t get their medical degree over the internet, and isn’t getting paid by the tobacco companies. Seriously… that is some dangerous and misinformed nonsense.
As for quitting smoking… Cold Turkey can be done, though it is difficult. About 10-11 years ago, me and a friend both managed to quit smoking through Cold Turkey… we agreed that, if he caught me smoking, he would get violent, and if I caught him smoking I could insult/lambast/ridicule him as much as I liked. It worked… for about 18 months or so, and then we started again for some reason.
I do still smoke these days… but it’s really my only vice (no chemicals/drugs, don’t drink except for special occasions, eat well, sleep well etc), and I don’t smoke that much (I don’t smoke it for the tobacco, but something else), tend to only smoke a couple in the evening, when I’m finished with all my work and the like.
I’m somewhat wary of any of these e-cigarettes and the gum and things like that. Yes, they possibly could make quitting easier, for certain individuals. But, on the whole, I think they’re just a way to squeeze a little more money out of you when you’re trying to quit.