The problem here is that every service could be provided another way. It seems that the only actual hosting option that doesn't leak a user's IP to a thrird-party is first-party only over Tor. Do we demand that every website is built that way? It turns out that outsourcing actually has a lot of value.

So where do we draw the line? Google Fonts apparently needs to be reimplemented first-party. What about Google Cloud CDN? What about an ISP that sees the user's IP in the packets?