I may be wrong in my understanding but I am gonna throw this out there anyway because it is based off my past experiences.
And I am only trying to help you understand what I believe to be true.
When a creator creates something for a kit, I think they can only use build/cas of items that are already in the base game since kits have to be compatable with every expansion, game, and stuff pack. If they want to create a totally completely 100% new item, never in the game before, I think they have to have consent first if it's to be sold and not CC for personal use??? Creating kit content for the game is not the same thing as having CC or MOD's. They are entirely different creatures.
Then there's the coding for each item like the bath tub has to be the same as with all the other bathtub/showers in the game. The actual picture that you see can be altered but only within the parameters already set with that object. If you have never created an build/cas item for yourself for your game, I encourage you to give it a try!
It will enlighten you and you will then really understand what these creators really have to do. I used to create my own stuff based off the items in the base game build/cas only. Using cas/build items from specific packs would cause issues with my game if I wasn't careful with the coding for ...hmmmm lets say, the fridges or washer/dryer which is only availble if you have that pack. It's been over 4 years since I have used cc - never used mod's. edit - or created cc for my game. (eyes not so good anymore)
I've actually created items in CAS and build/buy before.
Unfortunately I just don't have the time for it like I use to, but I am more than familiar with creating content. So programs like Blender are not foreign to me as well as Sims Studio. Same with coding and making small personal mods.
I know what you're saying, but can't say it changes my mind about anything. Creators can use a base for various items, no problem with that but for official content for pieces of this and pieces of that when it's more than obvious it's a frankenmesh? Sorry, just can't get behind it. Keep in mind not blaming creator for anything as EA okay'd this and this is what they do anyway with their CC on their patreon, since EA said it was fine to do so.
Would like my money to be well spent on actual unique stuff?
I've gotten less complacent with this game over the years and just tire of this.
Is it cute at first glance and gives a different aesthetic than other stuff in game? Yeah, is it all that unique? For me, no. It's all so samey. I do the same with any ea pack as well.
