Its easyer for younger and less intelligent (no offense to anyone this time) members if they have something "physical" they can work with, rather than having to update some txt file in the dark recesses of their add-ons foulder.
It also allows these to be updated quickly.
I do see a point that a server GUI by the host would make it easyer, but this allows it to be used by all clients.
Also, /whatis whatis
...
that sounds like soemthing from a really bad song...