Vaping keeps you addicted to nicotine. Other nicotine replacement therapies are available on the NHS, but the point is these stop at some point - you beat the addiction and eventually stop treatment
You can stop vaping in exactly the same way as you can stop using the patches/gum- you just wean down over time.
Now, people might not want to do that for many reasons, but in principle you can time-limit vaping or certainly the providing of therapy just the same as any other NRT. The starter kits provided by services that I know offer 4 free weeks, not indefinite vaping.
The lung cell study is one small piece of the jigsaw- there's no evidence in human epidemiology of harm through vaping, though it may well appear.
However, pretty much all vapers are smokers/former smokers- so they were at a 2/3 risk of dying an early death anyway. From that baseline, vaping is absolutely lower risk (as Public Health England, Royal College of Physicians all agree).
Should non-smokers with no interest in these things take it up given a hypothetical slight risk? I wouldn't- and they don't. Only smokers are really interested in vaping, apart from a few kids experimenting as they do with alcohol/cannabis.
Most people wouldn't expect the NHS to fund their vaping, that's why vaping shops are so popular. There are a few populations which are likely to need intensive support- so psychiatric inpatients, people with addictions, very heavy smokers with chronic conditions already and so on, and if they moved to vaping, it would be an overall public health benefit and cost saving, so I'd support use in those circumstances.