Wow! A red carpet wedding? Whose wedding did you attend, Princess Diana's? Like you, I believe that if a bride is going to have a red carpet wedding, the carpet should be rolled out ahead of time, not during the ceremony.
I think it has an air of "I am too good and way better than you" to wait until everyone has walked down the aisle and then roll out the red carpet for the bride, especially in a Christian wedding.
It sounds very royal or very Hollywood, but not very Christian, not at all humble, that is for sure. As a bride, I would have felt embarrassed to do this at my wedding. But again, to each her own. After all, it was her wedding so she could do whatever she wanted as long as she or Daddy could afford it!
