(Perhaps on another timeline browsers would have had an "up" button in addition to "back" and "forward" like filesystem browsers do, but that did not happen. Even <link rel> doesn't have an "up" option, though it does have "prev" and "next" – not that anyone uses <link> for anything but rel="stylesheet" and maybe rel="alternate". EDIT – rel="up" used to exist but was dropped from HTML5 with no reason given. I presume it's nevertheless supported by browsers and eg. screenreaders.)
[1] http://info.cern.ch/hypertext/WWW/TheProject.html
...No, that would be "back", not "home". Those aren't interchangeable terms unless you are coming from a (or your browser's) home page.
Anyway, this page is an FAQ about the site itself. It is not a standalone document. Without the context of the rest of the site, it has no meaning or value. There is no better use case for intra-site links than a page written entirely about content on other parts of the site.