Need help: exterior tv mount on fiberglass camper

Why would they care to keep the mount from contacting the fiberglass? Window frames contact the fiberglass. Awning support arm brackets contact the fiberglass. Door hold-open gizmos are mounted to the fiberglass. I can't think of any reason why a TV mount would be any different. I still suspect what you're seeing is just a sealant or gasket of some sort to keep water out.