[Lostion]

I have to wonder why this had to be done.

See it as a building bucket. Not everyone with Kodi uses RAR'd content (which is ludicrous anyway unless you're a newsgroup fanboy), add-ons are also easier to fix and upgrade instead of one big application blob, and the main Kodi application becomes leaner. 

Has noting to do with newsgroups, the most warez releases come via ftp and rared because of the autotraders and stuff not every idiot uses newsgroups and p2p/torrent stuff...