Nothing really suprising here I guess.
Nicotine gum in itself would not be as damaging as the previous delivery method.
One could probably go to a doctor and say they needed to stop smoking and can't.
I'd probably try to get the patch instead of the gum, and have a slower, less cigarette type of nicotine absorption. Which is believed to be what induces addiction. You could probably still derive good benefits from increased thermogenic effects without the high concentration peaks considering the 2 mg nicotine dose did not have significant benefits over the 1 mg dose.