Oh, there is haggling at every stage of the wedding business (my parents used to be in the jewelry business, so they saw that end). I don't think the photographer has it any worse than the florist, caterer, jeweler, dressmaker, tux rental, etc.
Personally, I find most wedding photography tedious and formulaic, so when we got married, I asked a friend who is a landscape photographer and loathes wedding photography as much as I do to photograph mine and I in turn photographed his. It all worked out well. We each wanted a few good shots rather than leather albums and the rest of that nonsense, and we each got what we wanted.