That study doesn’t say that the vaping itself has lower associated health risks, just that it doesn’t have the same, known risks as smoking. It could very easily have more risks that are as of yet unknown, because studies haven’t been around enough to tell. If I had to pick from the two, I’d go with smoking, because at least then there’s hundreds/thousands of years of knowledge about the long term effects.

Put simply, I’ve met old dudes who have been rolling their own grits for half a century or more, and still have the physical capacity to bushwhack up mountains with me. I’ve never met a fit old vaper.

(as an aside, rolling your own is the real best approach IMO: no disgusting cigarette butts littered everywhere, and there’s a mindfulness associated with the process that provides a limiting factor)