Actually, when I shot my first wedding, for a friend and as a guest, I was pretty inexperienced. I knew I was having some problems getting the results I wanted during the day and just went for quantity and blind hope. It was a mistake. Now I'd rate quality over quantity any day of the week.
I was shooting in Av mode, with bounced flash, but some strong backlight through windows during the ceremony was screwing with the ambient exposure. If I had known what I was doing I would have paid much closer attention to the histogram and locked in a manual exposure that worked properly from the off. As it was I had a sh!tload of fiddling to do in post and far too many iffy photos to sift through. I also learned the perils of trying to mix uncorrected flash light with the warmth of tungsten, and only found out about CTO gels in the enquiry that followed. At least by shooting raw I had some wiggle room. Thank God!
Here's an example on a quick fix of one of my first wedding efforts. It's far from great, very far, but at least I was able to patch up some of the mess. To manually correct each photo to this degree is a right PITA. It really should not have been required. 1 stop off on the exposure for starters - not good!
In my defence I'd only had the camera for three months and the flash only turned up the week before the wedding. My slow f/4-5.6 zoom lens didn't help much either, nor my aversion to going above 800 ISO. Still, you live and learn.