I have found some more information, all bringing me to the conclusion, that consumers should not buy anything that is not compatible with E-juice. The alternative types of materials, primarily polypropylene are the same cost of raw and manufacturing needs. Just because they are selling square pegs, does not mean that a round one is not required for the application.
If consumers are avoiding certain materials CHOSEN by the manufacturers, and Buying others, the end result will be a marketplace solution.
Its a mechanical type solution, as I see it. Nylon gears in some things work great, low cost, decent longevity, you can make cheap analog electric clocks for example. But you don't want Nylon gears under load, where they can shear off if too much force occurs. A motorcycle transmission for example. Form AND materials follow function.