To be honest, I'm still not understanding how you're not understanding the purpose of the protector cases when you just described exactly what I've said already, and apparently they've told you the exact same thing.
I'm still a bit unclear as to your explanations of trying to justify the difference between a shipping box, and a protective case.
First off, so what if they put the protective cases on for you? That doesn't mean that they were meant to be for protecting the game during shipment. It would probably be more likely that the game would get damaged if they shipped it with the protective case stacked on top of the game in the package, so they put the protective case on as a courtesy, not as a necessity for shipping.
Secondly, the boxes that they ship the games in are actually padded now, as reported by several LRGs who have ordered using boxes. In the past they have certainly sucked about using boxes to ship items, and just tossed a bunch of stuff in a box and sent it out that way. I really didn't understand how they could have thought that was a good idea in the past at any point, but at least it seems they have rectify that for several releases already. So in this case, a box would have certainly been much more secure, and safe if you decided to go that route.
Lastly, stop calling them box protectors, or protective boxes, because you're tripping yourself way up now, and just starting to get overly flustered because in your mind you keep thinking that: box=shipping. This isn't the point of the protective cases they sell. It's for collecting purposes, not for shipping purposes.
Look, LRG has a lot of rough edges that can certainly be smoothed out, but this issue you're having with them (if we can even call it that) is certainly not one of those issues. They do need to do quite a bit of work still in regards to making sure you get all of the items you ordered, which as you mentioned in your previous post, you didn't get, so you can certainly rail on them for that. This right now though, this isn't really productive as you're arguing about something that isn't really an issue in regards to shipping, but more about semantics of their product names.