I feel the same way, this is common in the auto detail industry, especially when it comes to consumer products. I feel like any product especially when it comes to cleaning "solutions" which may include water, Isopropyl alcohol, detergents, surfactants, or other solvents they should have empirical data to back up why they use those ingredients. From someone with no expertise in this area it seems when they wont tell you whats in it that seems odd because they say its so competitors cant copy their formula but couldn't anyone in that position simply analyze said solution to determine its ingredients.
When it comes to the tergitol I thought it was odd that they all denounced it immediately but only by saying its "toxic" and that you shouldn't eat it or whatever. Lots of things are toxic and lots of things are carcinogenic but this doesn't inherently mean that they are not safe to use nor are they detrimental to the long term "health" of the vinyl itself. The most frustrating thing about all of these panelists is they tend to talk about things as a "salesman" instead of simply explaining with data why they believe there process is ideal.