A one-line answer would be because wedding photographers catch one of the best moments in the life of a person on camera and transfer it to the photos; from an emotional point of view, it’s freezing a certain moment in the time paradox. However, jokes apart, who doesn’t like to feel the regalia from time to time? Wedding is an event that occurs once in a lifetime if you are not a Hollywood star and there was no way to visit an event back in time till the wedding photographers came into being.
Whichever name you might assign, the job of wedding photographers remains that of a person who specializes in taking photos; the only subtle difference that remains associated is they are specialists in making a beautiful wedding ceremony appear at its superlatives on the screen. That translated, wedding photographers not only take snapshots of the entire event but also puts all the best moments in special sequences to bring alive the special day and though the word once depicted luxury; today, the changing face of time has taken it to the point of necessity. That is, of course, if you want to savor all the moments you missed out as the bride and the groom.
The field of wedding photographers is accumulating real fast the people who can weave together multiple sequences with professional creativity; together with a sense of beauty and style and adequate training, wedding photographers can well cater to both personal and specific photography needs. But is that luxury? No way, if you want your grandchildren and the generations beyond to have a look at your wedding. With digital storage media getting half as expensive and twice as spacious and durable every passing day, it is highly possible for even your 10th generation to live the spirits up once more and follow the paths of their great, great, great, great Grandfather!
So let the professional photographers be in charge!