Not arguing here, but these are my thoughts on this.
"E-liquid is as addictive as cigarettes." Well, if they both have nicotine in them, then yes. I have to agree with that statement. On the other hand, I did not start vaping to quit nicotine, I vape to quit smoking and still get my nicotine, because I am an addict and I am man enough to admit it.
I have no idea what ingredients are in cigarettes, but I know they even include the sweepings from the floor. I smoked them for over 40 years without that list. I seriously doubt we will ever get that list.
I make my own juice. I know exactly what is in it if I make it unflavored. If I add flavorings, then I am at the mercy of the flavor maker. The chances of getting that list of ingredients is just about as slim as the one for cigarettes. It's just not gonna happen folks. Those are trade secrets and they are not going to give them up. The fact that any of them divulged which of theirs have diacetal in them surprised me. After 40+ years of smoking, for me to complain about the lack of a list of ingredients in flavorings would sound pretty hypocritical.
At this point, I am in this for harm reduction. How much harm reduction? I have no idea, but I can tell you that in just over 100 days of vaping, I feel so much better. I can breathe. I can sing for the first time in 20 years. Am I concerned about the ingredients? Yes, I am. That is part of the reason I make my own, but I don't think I know any more about the ingredients in my juice unless I use it unflavored. I have been experimenting with unflavored and it is not unpleasant. It has no taste at all and the vapor is nice and dense. I get my hit of nicotine and that is why I vape. I have pretty much decided that I want to switch completely to unflavored juice when my stash runs low. This should make my coils and wicking jobs last a whole lot longer. Since 4 friends also vape my juice, I will have to continue to make my custard, and it is so good that if it is in the cabinet, I am going to grab one of those bottles every time.

The flesh is weak.