OMG...Is this the only photographer in New Texas? Why would you want to force someone to do something that they don't want to do? Haven't you been in a restaraunt, and preferred the nicer waiter over the nasty one.
If I was served by a nasty waiter, I'd be worried that maybe they would spit on my food. Can you trust that the photographer who doesn't want the job, to do a good job?
Move on, and ask Elton John, "Who did you get for your photographer?"