It is for technical users. Inexperienced users may easily get lost navigating an FTP site.
The best location for the clean installer is Adobe's FTP server:
What pat said; some would't know how to find the installer they need if they are no using Win or need an older version.
Pat, I very much doubt that any simple user can help you with your original question. At least, I can't.
go to this link and click on direct download link and that's the only way to go to http://get.adobe.com/reader/direct/ without being redirected