I never used an outfitter myself, but learning that you usually get more than one adult tag, the others are probably just jealous that they got skunked.
If they have more than one adult tag, then I would shoot for a good start.
I do have other friends that moose hunt with an outfitter. They get one bull and one cow tag from the outfitter. So getting only one bull tag didn't sound unusual.
When I see one of them again, I will ask the question on how many tags are included (other than the automatic calf). That would be the decider if I would shoot.