I do not know why they want to get rid of snus and e cigs and dissolveables and anything that is LESS harmful than real cigs and keep the real cigs that are known to cause lung cancer available. I just don't get it.
The comparative risk of these newer products is irrelevant with relation to cigarettes - they are not 100% safe therefore they will not be allowed to be promoted. They might be allowed to remain legal/unclassified - that remains to be seen. The fact that cigarettes already exist and are legal is nether here nor there; they are different products.
As has often been said - if alcohol and tobacco (and possibly coffee) were discovered today, they would be made illegal immediately.
To give an analogy - if I were do invent a new product that claimed to give similar effects as alcohol but without the liver disease, would it be allowed? Even if it were proven to be "safer" than alcohol, it would, by it's nature be addictive. Why would any government want to allow yet another addictive substance into society despite the wishes of its citizens?
Plus, it's taken decades to move the public perception of smoking (an admitted public health disaster) from venerated to acceptable to tolerated to despised. All that work undone, diluted or these alternatives causing perceived confusion (in regulators' minds).
In summary, one could say that the current view is that no level of risk or addiction is acceptable (not my personal view by-the-way).