>>714564606
The reason they did this is to make Khadgar more "diverse".

He was previously able-bodied which makes him undiverse. Blizzard turned him disabled so he is now diverse (and thus, morally a better person according to Blizzard).

This is only the start. Consider Anduin. According to Blizzard's diversity tool, he scores a 0 for diversity. They will probably make him disabled/old via magic/transgender to "correct" this "mistake".