Well, i mean i would be all for that but in reality it might not be that easy. It could rely on dependencies that are proprietary that cannot be shipped or provided with the project.
It could alone be that the connection is hard coded in the game itself so instead of just booting up the server and being able to play you would now have to do something to the game itself too that it finds your server. Nothing really that cannot be addressed, I mean people could do that with ragnarok online private servers but not something your normal gamer could do.