wood or metal trusses

My funfinder has "aluminum superstructure" ( wall and roof assemblies ) and wood for all of the internal structures, like the bases for the dinette seating, etc, etc. What irritates me is that when they assembled all this stuff inside, they did not bother to glue the joints. The staples would probably be an acceptable mechanical device to hold the joint together while the glue set. As it is, without glue in the joint, we are relying on a simple, small and rather short staple to hold these parts together. I recently had a joint under the dinette seat that had begun to come apart, so I put it back together again with glue in the joint.
One would hope the manufacturers that are using wood in their wall and ceiling construction are also gluing the joints in assembly. I have no idea though if that is true or not.