Confusing
If something is easy to take apart it does not mean it is repairable.
If Apple blocks 3rd party vendors from selling spare parts then you can disassemble the device all you want, but you won't be able to make it work.
At very least it seems like it's possible to swap components from donor broken devices. However, we don't know if that can change with just a software update.
It's common for manufacturers these days to silently change the specs of a product after it has been reviewed by the media.