But why does it matter if their accountant is a creationist? Their tour guides sure, but other staff?
You got me. I'll apply my abduction skills to the problem.

The employers fantasy that creationists' assumed attitude of giving up their will for the greater good makes for trouble free employees over an atheist troublemaker that will cost the employer in excessive debate that he will pursue, or his co-workers' trying to convert him in the work place.
You might have seen in the sky those little birds flying after the big slow bird, all the while dive bombing, pecking, and harassing the slower one. It happens in a diverse work place too. Not to say it can't happen if all are the same order Baptists or whatever. But if all the worker's kids are on the same little league baseball team there is less chance of conflict over baseball at the work place.
I'm no labor expert. There is a sci-fi book called
Destination: Void written by Frank Herbert the author of
Dune that discusses, in a stylized form, the problems of choosing a team and, of all things, they decided to use clones for a rather proprietary reason.
Wiki said:
The clones have been bred and carefully selected for psychological purposes to reinforce each other, as well as to provide various specialized skills that will give them the best chance of success. The crew includes a chaplain-psychiatrist, Raja Flattery, who knows their real purpose, and that the breakdown of the "OMC"s were planned. He's aware that several ships have gone out before theirs, each one failing. He understands the nature of the test: create a high pressure environment in which brilliance may break through out of necessity, and create in the safety of the void what humans couldn't safely create on Earth.
And I'll abduct that it must have been studied by NASA, sports teams, and marriage counselors, but certainly not married men.
Bachelors know more about women than married men; if they didn't they'd be married too. ~ H.L. Mencken
