“Egg Matza can be eaten by anyone, not just sick”
He should have specified: the sick and the Sphardi.
Ashkenazim do not eat egg matzah. The Rema doesn’t even allow for it after zman issur on erev Pesach.
How did egg matzah even come into this? The OP said they had not said hamotzi yet, just al natilas yadayim. I’m 99.9% sure I heard in a shiur that, in such a case, it’s not a brachah l’vatallah even if you never get to eat the bread. The basis was that if something wasn’t a brachah l’vatallah when you said it, you can’t retroactively make it one.