See where the little msata is, all they had to do is put a little panel with a couple of screws on the back to access it like under a laptop, but no, that would be too easy.
Apple is notorious for that, I had to put a new hard drive in an iMac and the same deal pull the whole thing apart, iPhones the same all sealed, Samsung you take the back cover off and replace the battery.

If you pull it apart and put it back together at the same time it's ok, but if you have to wait weeks for parts you forget how it all went back together and end up with left over screws !