It occurred to me that Argus might be the former Egg of Sargeras. He thinks very highly of himself, and thought enough of the Dranei to not only notice they existed but choose them to lead his Legions rather than destroy their world as was his usual method.
Not much to go on, I know, but if true we don't need to worry about Azeroth waking up and destroying the planet at least.
Have a great week.!!!