* ISPs discouraging or even prohibiting servers, due to bandwidth or other concerns.

* Laziness/generally complacent attitude. I think this is a deeper issue than the first one, since a change here may make ISPs reconsider. A lot of people just don't want to learn about how to setup their own server for email/webpages/etc. and would willingly give control to someone else despite the privacy/freedom implications of doing so. In other words, they value "easy" over control, privacy, and freedom. The same reason walled-garden DRM ecosystems have been so successful.

I'm strongly in support of a decentralised and more "user-centric" Internet, where almost everyone has their own servers and websites, and knows more about how things work, but I think there has to be a huge shift in social attitudes first.