It makes sense to me, actually.
I get what you're saying, but I believe the logic is: this team has a chance because of Romo. He's that good. If Orton takes over, our team goes from a contender to an average team. But look at a team like the Rams. They have no delusions that Bradford or Favre or Tebow could take them to the Super Bowl-- they just wanna win some games here and there. To put out a somewhat decent squad that their fans will come and see. A team like that would be willing to give value to a proven vet like Orton who is believed to be one of the best backups in the NFL. For us, picking up a little something that would help us win a title either this year or in the future is worth it because we have title aspirations. It's worth it for the other team because they have 'let's win a few games' aspirations.