I wonder how much of the strength comes from cardboard and how much comes from the glue. Wood glue is stronger than wood, so is the cardboard just a lattice for

I wonder how much of the strength comes from cardboard and how much comes from the glue. Wood glue is stronger than wood, so is the cardboard just a lattice for a PVA shell? I guess it could use a similar principal in carbon fiber reinforced polymer, with cardboard taking the place of the carbon fiber and glue taking place of the polymers. It also reminds me of wood turners who "fill voids" with cyanoacrylate glue so much that the main material they're turning is the CA glue itself.