Between [Today, 09:07 AM] and [Today, 10:22 AM], local time, a light went on. To get equal performance from steel you'd have to 3D print voids at teh mesoscale.
And, seriously, those bamboobike folk go on about randomizing the loose fibers. They could just use
hemp tape and rely on the weaving to structure the fibers. Then it's down to how you wrap the join. And drawing the air bubbles out from the resin with a vacuum.
Want to live in a doughnut?
https://inhabitat.com/sustainable-bamboo-pavilion-for-communal-living/bamboo_pavilion_02/