Agreed. But not impossible. Insignia got original Halo 2 Xbox Live servers back online. Most nights you can find a game easily with 20-40 people online during peak hours. It requires a soft mod and maybe 1-2 hours of set up to get online. If anyone could just turn on their old Xbox and play, I’m confident those numbers would be in the hundreds at least.
Allowing people to run private servers is an easy way to allow those that want to play to keep playing in an era where most games have some level of online functionality.