You prove my point exactly!
How do you know? Do they play the same schedule? You are speculating, which is what all of the voters do.
Remember when New England won their first superbowl? Everyone said they had no business on the same field as St. Louis. You never know until they play.
Just because you or me or any journalist says "they don't belong" doesn't mean they shouldn't play.
Do you say this about any other sport? Do you support playoffs in other sports?
Let them play in a playoff. If USC is that good...they'll roll over Alabama and prove their worth. The regular season is where you earn your rank. The post season should be where you defend it!