Sideways interlinking in silos

[DownPour]

I've been looking at a lot of Silo illustrations and reading a lot on the optimal silo structure lately.  In many of the illustrations I see the Silos are all linking down or up in the structure, but not much sidelong action.  But I read about how you are supposed to have a "mini sitemap" on each page in the silo that links to every other page in the silo.  Is this really a good idea?  Seems to me you would only want to link up & down in the structure, or at most have links to the "next" & "previous" parts of the silo (sideways).  Having all those links on a page would just dilute the link juice wouldn't it?  I hardly ever see illustrations for linking sideways between pages in a silo, yet there seems to be a lot of talk about it, which is correct?