I tried to quit several times, I tried the gum, the patches, Chantix and cold turkey. None of them allowed me to successfully quit. Vaping was good enough to temper the nicotine cravings enough that I could otherwise function without regular smoking. I have cut back on nicotine content over the years. Now, I'm using the lowest nicotine content liquid that I find readily available. The next step is to mix it with 0 nicotine liquid until I can make another attempt at quitting.
I agree that non-smokers (especially children) shouldn't do it because it can lead to nicotine addiction but for smokers, it's a miracle product.