The physiological addiction actually changes the way your brain processes pleasure and can deprive you of the necessary amounts of dopamine you need to function on a daily basis if you take it too far although that doesn't seem the case from the experiences of most forum users. Psychological addictions can be harmful if abused, such as food addicts, gaming addicts, or other weird addictions people can develop, but those do not alter the way your brain processes pleasure but condition your mind to depend on something for pleasure. I still crave the nicotine, just like a crave a nice kona blend coffee in the morning, but if I leave the vaporizer at home, my pupils don't dilate nor do I get crazy ideas like jogging to a gas station 3 miles away for a pack of smokes, not that that's the case with WTA users, but by putting all the ingredients of tobacco together with nicotine, you eventually end up with something that very closely resembles tobacco, which is what I think is the case when people use the term "whole" tobacco alkaloids. A fun fact about nicotine is that it is classified as a stimulant, but acts as a relaxant when you use a lot at one time as there is a "bookkeeping" system on most presynaptic axons that keeps track of the amounts of nicotine in the synapse and when there is a large amount of nicotine present, it reverses the stimulatory effects of nicotine, which makes sense because you wouldn't want your brain on overdrive every time you ingested a larger than normal amount of nicotine (I love run-ons

. Basically, I like to vape as means of relaxation now as opposed to the "I must have a smoke or I'll gnaw on the door knob" kind of thing in the past.Anyways, the lack of combustion, obviously, is a great improvement, healthwise, over tobacco smoke, but people can still have strong addictions to chewing tobacco, which also significantly raise the risks of cancer.
There is too little information on WTA liquid and its effects on the body, but this would be the argument against it until some empirical evidence shows up. Good on ya