I can list every way in which I am wrong. Yet, I find that list to be objectively incorrect in every way. The people of Camelot deserve prosperity, and change is required for that. I believe romancing morgana is the perfect catalyst for that change.
If that happens their kid is basically gonna be Daenerys 2.0, and will burn Camelot (and broader Avalon) to the ground atop their dragon. Thus, Merlin's prophecy would be fulfilled.
