It horribly skews the meaning of the cross when contemporary prophets of self-esteem say that the cross is a witness to my infinite worth. The biblical perspective is that the cross in a witness to the infinite worth of God's glory, and a witness to the immensity of the sin of my pride.
Series finales have that responsibility to leave you feeling good about entire series. You want to feel like the viewer closes the book satisfied. And if you strike out on the finale it skews how you feel about the entire series.