While that might be true there is still a point to be considered regarding vaping which is that it is an order of magnitute less harmful than smoking tabacco cigarettes because nothing is burned in a vape and the "burning stuff" is what makes normal smoking so harmful. Therefore I'd argue it should definitely be available for smokers at a price tag lower than cigarettes if they can't quit smoking to reduce harm. This would massively decrease the huge costs for health care.
If I tell a lie to support a good cause and you tell a lie to support the same cause and a third and a fourth person do the same thing then, then, being so propped up by lies how can we be sure it even is a good cause worth lying for?
In this way, the harms of lying compound while the benefits do not. For this reason I believe it highly unwise to allow it to be normalized.