I am not going to disagree with you but in MY case / experiance, it’s not just the antifog coating.
If it was, why would A) I need to clean it off every few months (the af wouldn’t keep coming back would it ?) and B) why would it also get on the rubber / silicon parts ? (It’s much easier to clean off those parts though just by stretching / rubbing as I am not worried about scratching them).
WD 