Because we as a society are better when everyone has access to the Internet. Just as we ran electricity and running water to neighborhoods that could never pay back the investment. Just like we build roads, bridges, and tunnels that probably never be afforded by the people they serve.

Maybe the person that lives in that house in the next generation is the next great scientist that discovers how fusion can work reliably for us. If that is the case, then it was worth 30k to link that house to the Internet.