
I got married in 2003 in a Carib country. The photog, a rather a successful B&W photog specializing in portraits of jazz musicians made for a really really bad wedding photog.
I realized that wedding photography is a specialization. I, certainly, would not do it.
The reverse is true. I know about a wedding photog who did a news assignment and the pics didn't come out so good...

I just asked the misses.. "When do we get the wedding photos?''
Reply "I don't know, usually they need 1-2 months"
ME "What the f***"
Misses "But they are going to make an exception and do them before i go back to England"
.....
The misses is going back to the UK on the 15th of Jan, two weeks after me..
I was in the Dominican a few weeks ago for a family wedding, they hired the photog out of Toronto and he was scheduled to be in town for other assignments too. By the end of the night, he had a slideshow going on his laptop for guests to see. But he did cost 5-6x more.