The anit-smoking side views harm reduction as a movement that is completely against their efforts. To the anti-smoking side, vaping is the same as {cigarettes, cigars, pipes, shisha, snus, ...}. The anti-smoking side's stated agenda is absolute eradication of tobacco use in any form, and they've hit all fronts just short of prohibition.
The pro-smoking side take a small-l liberal view: People should be able to use tobacco. Their problem with harm reduction is that harm reduction is also against their stated goals. While the pro-smoking side will happily embrace vaping, they view it as yet another way to enjoy tobacco.
In the meantime, people like their vices. As an exercise, re-write the Economist article, but substitute "alcohol" for "tobacco". As I recall, there was such an article posted to HN that showed how journalism colors the perception of drugs by writing about alcohol use as if alcohol was a new drug, not a very old one.
Back to my point on harm reduction, I believe that sooner or later a stasis should be reached. Harm reduction will be embraced by both sides. I believe that the only way to reduce the negative effects of any substance use to a society is to teach the risks and the safest way to use the substance. I think that the end result will be an open market where the suppliers of the substance will sell their product in any way they can and a corresponding social pressure that pushes users towards more acceptable (less harmful) practices while supporting programs that allow for self-selected cessation.