An undrafted free agent takes over for America's Team and holds the reigns for over a decade. He leads the team to some division titles and playoff games. He became the franchise leader in several categories, including yards and touchdowns. He made a ton of money and became a household name for good and bad reasons. He left it all on the field. I do not consider his effort wasted at all.
Howver, I feel the team failed to give him a quality OL for the majority of his career. Also, our D was mediocre at best much of the time. Because of this, Romo seems to have forced more, causing more mistakes. When you can't trust the D to hold the other team, you take more chances to try to secure victory. For Romo it bit him in and the team in the backside.