I don't understand the point of CC being a thing on the gallery for Sims and lots...

This is why i make every effort for anything i upload to be free of CC content. it is more trouble than it is worth without knowing what mods a user has uploaded with, not that EA would ever let you know, being third party and no support for such things anyway, they got no reason to do such a thing.

if i see anything uploaded has CC i take it down as quick as possible and try to find what is causing it and then re-upload when it is free of CC. often that means disabling mods and scripts from the options and reloading the game.