I understand the decision, but I think with how explosive the Lions offense is, with how good the Lions are generally, you're going to have to steal some possessions (if you're the Colts). You're 5-6, they're 9-1.
You've got a bad backup corner whose already been burned once and you didn't connect. Try to draw up a long play on that side of the field.
But again, I'm cool with them handing Goff the ball on 3rd and long.