It means that there is a psychology component. That people who are addicts, nicotine or whatever, spend significant portions of mental energy focussed on the object of addiction.
Great thing about e-cigs is that you can wean yourself off the nicotine while still keeping the simulation of smoking. You can buy progressively lower nicotine concentrations until you feel comfortable with no nicotine. Once you don't have a physical addiction, giving up the e-cig entirely becomes easier. I used to smoke cigarettes and drink caffeine whenever I was staying up late to study. School got harder so more late nights meant I smoked more up to the point I was smoking during the day just to smoke. I switched to a vape with a high nicotine concentration instead. I found that I used it much more often, I could get a nicotine fix indoors but at least it wasn't a real cig. I started backing down the concentration and the use (mostly due to the public image of looking like a douchebag blowing huge clouds) and now I'm at the point where I only use the lowest concentration when I'm in the car alone. Nicotine addiction is barely on the radar for me anymore. Smoking really doesn't have that "volume knob" that vaping does. You can make that responsible choice of buying lower concentrations that isn't really possible when you buy a pack of cigs.
The article says they are 95% less harmful than cigarettes. Yet you say you still think they are “worse for you”. Regardless of accessibility, I just can’t see that being a sensible statement. You can’t say whatever psychological harms may be occurring are worse than death - that’s insane. Fewer people are dying, they’re less harmful, period. Not ideal, sure, but we’re moving in the right direction.