Those are namespace though and like namespaces in coding they are meant for (content) disambiguation. Trying to use them to organize pages and tags hierachically is shooting yourself in the foots because it's a too much strict structure you can't modify later...
Check this write up on how namespace and other structures work in #Logseq :
https://discuss.logseq.com/t/different-ways-to-structure-data/8819
And here there is a proposal for implementing relations like parent/child between pages/tags:
https://discuss.logseq.com/t/specify-and-display-relations-between-pages-tags/9005
@markmcelroy no problem ;-)
@post Interesting ideas. These may be one of those distinctions that matters a great deal to a programmer (or a "pro," generally), but matters less to a casual user. I'll "cook" this information a bit. Many thanks for bringing it up -- and the informative link.