Technically, what you describe ("www.example.com", the root domain, to "www.example.com/content", the actual website entry point) is a redirect. But there are big advantages to us to list the root domain anyway. So we do.
Suppose you change your content management system to some other system, that always adds "/index.htm" to the root domain. If we list only your root domain, then our listing still works.
Or suppose you have multiple, equally functional, entry points: example.com or example.com/content/ or example.com/content/index.htm or whatever. If we just list the root (whenever it works), then we won't accidentally list multiple URLs for the same content, just because Eddy editor uses Google search, which shows it as /content/index.htm, while Edie editor uses Yahoo search, which found the /content/default.htm entry point.
That keeps life simpler for us.
It's the cross-domain redirects that we do not list, because they cause us so much difficulties, and the offsetting advantages are so few and rare.