I dips me lid to wedding photogs - I reckon it is a really hard gig. It's not all about the mechanics of photography, it's also about people management, being able to conceive a suitable concept, and being able to work under the pressure of the event with people who can be incredibly stressed, and to produce acceptable results within the time frame allowed.
I have had many relos ask me to "do" their wedding and I always refuse and tell them to hire a pro. That doesn't stop me from taking my camera to the wedding, taking the pix that I enjoy (whilst still being able to enjoy the wedding) and giving them to the couple as a supplement. I have even given Momento books as wedding presents to people who have engaged a professional weding photog.
At a wedding I attended last year, taking my camera with me, the wedding photog had exactly the same gear as mine. During the reception, he set up his laptop with a projector and screen and showed about 5 minutes worth of pix. They were truly excellent, and the audience was spellbound. (I felt like selling my equipment
)
But still I had some candid pix that he did not, and the couple were pleased to see them too.