I didn't critique their security model, I said you wanting greater convenience to exfiltrate keys and documents, even if its to a system that is more secure for you, is not arguing for better security and privacy in their product.

Your comment makes no sense. You can already export all the keys Protonmail generates (which I don't want to use and neither should I be forced to use). Not allowing the user to use their own provides absolutely no resistance to any kind of exfiltration.