Maybe they should build them out of Giant Redwood.
Bug and fire resistant
Very bug resistant. Back in the 50’s the roof trusses of houses around McClellan AFB, CA were built with redwood. However, 80yo redwood does not take nails or screws easily. The beams have cured so hard, they’re like iron. It’s almost a shame they’re hidden in the attic where no one can admire the patina.