I’m not sold on these war horses being giant.

I’d actually never thought about this which is strange considering how interesting I’ve found dogs of war. Doing some quick research it does not sound like medieval war horses were huge.

https://www.smithsonianmag.com/smart-news/medieval-warhorses...

There does seem to be some disagreement about it, but I've always read that Destriers in particular were pretty big. But there were a lot of different types of war horses, and a knight would often own several for various different purposes.