It makes no sense to me, burning the clock and not having enough time to score more points when your defense eventually gasses out for being on the field too long is literally the worst case scenario. Send in second strings if you're terrified of injuries if you must, but keep the pressure up.
Bengals just gave Egals two gifts moving the chains over 25 yards and onto the Bengals 45 yard line. If Wentz can't win now, his true colors are certainly exposed.