Probably a smart move for him

Yes, he loses a little time to put together a staff and the recruiting, but the recruiting season is mostly over anyway. But being on TV this week and, hopefully, through the national championship game puts his name in front of kids he'll be recruiting next year. And having a ring to show recruits speaks volumes. Doesn't hurt in hiring assistants or getting support from you administration either. Also, shots at a national title aren't easy to come by, you take them when you get the chance.