I will stick up for spiralcoaster. This post is direct and could be interpreted as offensive. Sarcasm both in general, and especially over text is often not appreciated. (It partially depends on culture). Yet, I think this analogy is appropriate here, and I was thinking along the same lines.

But people do 3d print frames for drones and gliders. It's undoubtedly worse than carbon fibre, I guess, but I found it interesting enough to share that you can buy especially lightweight filaments designed for aeronautic stuff.