I don't see the problem. You need to have spaces for the OS itself. And then, it has this awesome feature where you can completely recover your device all the way back to factory condition, which also takes a lot of GBs.

If you don't like the Apps it comes with, you can uninstall them. Uninstall Travel App free up at least 200 MB.

And then, there is File System Directory and VRAM. Those are all common things to reduce the spaces. I am pretty sure those happen on other devices too.