> Lots and lots of programmers have very little understanding and especially operation knowledge of how to host a public service. You can be an extreme graphics programmer and not know the web stack at all.

Can confirm.

Also, not everyone who wants to share content publicly has a domain name with which to do so, or the kind of Internet connection that allows running a server. If you include "hosting" by using a hosting provider... it's perfectly possible (raises hand) to not even have any experience with that after decades of writing code and being on the Internet. (Unless you count things like, well, GitHub and its services, anyway.)