SEC/Brand Bias - Northwestern vs LSU

I am perfectly fine with LSU being ahead of Northwestern BUT LSU being ranked 10 while Northwestern is unranked is ridiculous and a perfect example of what’s wrong with the AP Poll. They have played almost the exact same caliber of schedule and had almost the same results. (Close loss to a top team and destroyed a bad P4 team and bad conference opponent). Please explain how if you took the names off the schedules why there should be that large of a discrepancy between their rankings?