As someone who actually hosts stuff at home, I'm not sure everyone does. I don't, for one
Maybe if you're on a limited data plan (like in Belgium or on mobile data), you'd want to prevent unnecessary pageloads? Afaik that doesn't apply to most home connections
Or if you want to absolutely prevent that LLMs eat your content for moral/copyright reasons, then it can't be on the open internet no matter who your gateway is
