Coagie, from your posts on this thread, I gather that you aren't a professional pilot. Though fatigue can be an issue, I seriously doubt the pilots were both sleeping on final approach -- or that either pilot was -- and it is an insult to their families and to real pilots to suggest they were (while citing zero evidence to support your wild speculation).
If I'm wrong, I will be the first to admit it -- but I don't expect that will be the case.