My understanding is that the proverbial jury is still out on whether vaping truly is less harmful to the lungs that smoking[0][1]. That would mean that vaping (instead of smoking) isn't necessarily a positive health outcome.
[0] https://newsinhealth.nih.gov/2020/05/risks-vaping
[1] https://www.hopkinsmedicine.org/health/wellness-and-preventi...