They only have 1/2 of a elite team. Bama and Ohio State were around the top 10 also in defense; FSU and Oregon were in the mid-50s. It's a no-contest.
Seems every year, pollsters and pundits go gaga over teams with top offenses, ignoring that other half of the equation—until a good/great defensive team dismantles the high-flyers in a shocking, shocking upset.
And afterwards, lots of folks in denial trot out the "9 out of 10 times, the high-flying offense team wins that game."