In the NFC, the team that reaches the Super Bowl will have to get past the Saints (Brees), Seahawks (Wilson), Packers, Panthers (a healthy Newton), Cowboys (Prescott), and Eagles (Wentz). That's not even mentioning the Niners and Vikings. Besides Prescott, that's 4 QBs that have gotten their teams to Super Bowls (plus Wentz and Prescott).
In the AFC, assuming Mahomes comes back in a month healthy, it's going to be the Chiefs playing at Foxboro in the AFC championship. It's almost like the Patriots will have a bye before that. The other playoff teams right now would be the Bills (Allen as QB), Ravens (Jackson), Colts (Brisset), and Texans (Watson). Not a single one of those teams have a QB that's ever won a playoff game.