You do realize for them to get home field throughout the playoffs that both KC and LAC would have to lose both their remaining games, right? That's just not going to happen.
I'm pretty sure he means in the playoffs.
NE gets the #2 seed and KC or LA (whichever is #1 seed) lose at home during Divisional weekend. Then NE would have home field if they get to the AFC Championship game. Meaning they wouldn't have to play a road playoff game.
It's quite possible KC/LA play on Divisional weekend.