I could see the benefits for medical use. The particle size in the vapor is so small that it can easily cross the capillary bed and enter the blood stream, bypassing the digestive system. What I find amazing is that some produce has hundreds of regulations attached to it by the USDA and FDA, while this e-liquid goes for the most part unregulated and with no quality control.
Just guessing here but it would not surprise me to learn that over the decades there has been a great deal of research on vehicles for inhaled drugs. My guess is what is known about inhaled warmed glycerine is that it is pretty innocuous. So when a product that was inhaled glycerine with nicotine added no one anticipated any problem. Now, with millions of people involved there have been a handful of “attributed to” cases that introduce a little uncertainty. Americans seem to be willing to do just about anything to “save the children” so it doesn’t surprise me much to be subjected to yet another round of wound up people insisting the government DO SOMETHING.
In a country $22 Trillion in debt and forever wars scattered over half the planet seems to me politicians would have no problem finding even bigger problems that require they DO SOMETHING but those problems that are so intractable seem to be best ignored, for politicians.