Pre-season rankings are the worst thing about college football. We're supposed to put more stock in to how people predicted a team would look than how they've actually looked?
I don't think Notre Dame will make it to the title game and I don't think they'd beat Alabama, Florida, or Oregon but they've absolutely earned their spot as a top-5 team. Their defense is giving up 8 points per game, second only behind Alabama's defense.
This argument isn't getting anywhere because you refuse to see anything other than your anti-Notre Dame side of the story. They'll probably end up losing to either USC or Oklahoma, maybe both, so they won't be in the title game. Until then, they've been a legit team.