This was practically a dream to him ever since Williams birth; this is all he had ever wanted—not to have to clip their child's wings and let him fly freely.
To not have to worry about dragons knocking on their door just because they allowed him to use the gift he was born with.
To allow their child to be happy and live out his dreams instead of being scared for his safety.
If it were up to Rex or Myra, they'd without hesitation choose to have a non-talented kid they could easily protect and keep safe.
Instead of the second-ever divine aspect in history, who's destined to ascend to godhood and has quite literally the world itself trying to kill him,
Sure, Rex and Myra were considered overpowered by mortal standards, but at the end of the day, they were just two people, and even despite their strengths, there was only so much they could do.