The Meaning of Life, the Universe, and Everything.
Minecraft needs more structures, obviously. But, coders aren't necessarily the best builders and the best builders don't usually write code.
Let's put them together! Find YouTuber's that are good builders and tell them you want to create a mod named after them using their builds, e.g. "The VintageBeef mod", "The Xisuma Structures mod", "Bdoubleo100's Mod", etc. Those people are probably too busy to be interested, but I guarantee there are hundreds of small channels that would love to participate. If you know any likely candidates put their names in this thread.
How about dungeons? The best dungeon builders, by far, are the CTM map builders. Make the same deal with them. Here's a CTM map thread with a bunch of map makers. These guys can do some crazy stuff that would be super cool to have in a modded survival world.
You name the mod after them because it promotes them as a builder, and it promotes the mod. It's still your mod though. You are the dev. It's a win-win. And, another win for the community because we get MOAR STRUCTURES!!