Considering that none of them have ever been on a team how the hell do they know how it will be? I can almost guarantee that what they think it will be like will be nothing like what it is. If they can't handle the pool they will fail when its the middle of the night with three foot swells, 50 degree water and 45lbs of gear.
Don't threaten me with a good time!
The "you get to do this and that on a team" conversations are the best. Usually ends with a giant face palm.