I know many photographers, who are highly respected, but I would not want them shooting my wedding photos. A professional wedding photographer has the experience to handle the complicated lighting situations that come up during the course of the event. They are also experienced at knowing where to be and when to be there to get the best shots and angles. It also take a certain personality and finesse to deal with the many people that the photographer will interact with during the day.

Considering the importance of the photos, the once-in-a-lifetime condition of the day, and the cost and stress you will have to endure by not hiring a professional, it really is probably less expensive to hire a pro and leave the worries to them.