Actually, several recent studies have shown Lockjaw to be right (as usual). According to researchers at Duke University's Nicotine Research Program, "the urge to light a cigarette can be more compelling than the physical need for nicotine."
Oh there is no doubt that the psychological addiction is quite substantial. And in all people one can be more compelling than the other.
But the physical addictive properties of nicotine, which are very substantial, have been know for well over 30 years, long before the cigarette nazi's came to power.