For one, in case you might be wondering, it keeps me regular. That is, generally, in the morning after just waking up, a cigarette requires a bathroom trip immediately after. At night, it actually lowers my blood pressure when stress levels are high (Ive tested this by taking my BP before smoking and then immediately after - and yes, I know how to properly take BP, took some training - I even use a stethoscope

). Where cigarettes become bad is more than 2-3 a day. Most smokers smoke at least a pack a day - not good.
Vaping isnt a smoking cessation device for me, it just lets me cut WAY back on cigarettes, using cigarettes only when there is a big craving.
We all do things that are bad for our health. Vaping is just letting me do less of the thing that is bad for my health.