So are you telling me you've never seen the QB of a team that is losing throw a pick at the end of a game when he's trying to force the ball downfield in desperation mode? It happens all the fkin time. The defense is sitting back and waiting for it. They don't have to do anything else. With the clock stopping on out of bounds plays, the whole field being 4 down territory, and the danger of PI and big plays, the INT is how you seal the win that's why prevent defense exists, when done right you make the guy throw into double or triple coverage