There is no shame in relying on a community willing to collaborate and adding content, as long as credit is given when requested, and payment is given when it can be afforded
My first advice to any game dev is that if the game has an open setting or sandbox mechanics, make it as moddable as possible from the get-go and focus on core elements
If the core design of the game is good, that will make it easier to cultivate a community, and once you have that, they'll adopt the game and make the game more than it could ever be
Look at Starbound, which felt unfinished when they stopped development, but the many mods there are nowadays make that irrelevant, and now you even have Sexbound
Lilith's Throne may be poorly optimized and development may be sluggish, but it's full of great ideas and designs I love to see in other games