I've been a serial quitter most of my adult life. Think the longest I went nic-free before caving again was 7 years.
Everyone's got their own reason(s) for smoking, and their own reason(s) to quit. Long ago I read that nicotine is possibly the most addictive substance on the planet, it's worse than ........ I'd agree. It's the only vice I've never seemed to be able to completely give up (other than food, water and sleep).
If it's the other famous 4000 chemicals in smoke that do the real harm, I guess I can forgive myself for indulging my addiction if it's delivered by vapor without the carcinogens. Though in my family of origin, any lack of self-control is viewed as a huge moral failing, vaping is something I can live with. Stealth vapes have kept me sane during the past couple of months, including highly stressful situations in the company of people who've had no idea I had become a closet smoker again.
For many, the oral fixation and hands-activity aspects are VERY strong psychological associations, stronger even than the chemical addiction. E-cigs can help the transition better than gum or patch or prescriptions, I believe, because of this. You can reduce your nic levels as you want, if you want. I can actually foresee a time when I don't need an inhalation device as a crutch anymore, and believe it'll be easier to wean myself off of vaping than it ever was trying to do that with tobacco.
One step at a time; even baby steps count.