Because this coaching staff lacks foresight.
Most good/great coaches plan ahead. For any possibly situation. That’s what game planning is. You plan for different scenarios and situations, but again, this is the Cowboys we’re talking about.
Instead of game planning, they play chess and trashketball in the locker room. They smash watermelons and have buffets in the film room. They goof around in practice and are too busy playing dress up and coming up with one liners for the NFL mic’d up video on game day. The priorities of this team are out of whack. That new Vikes coach? He properly prepared his team for a comeback. For an OT victory. Giants? Yeah they hang on by a thread in every game but they get it DONE. They know how to finish. They know how to crawl out of holes. Same can be said for many coaches finding success right now in the NFL.