It makes sense if you think of what the purpose of Chrome OS is. The point is not to make inexpensive hardware to run any OS on. The point is not to create a new general-purpose open OS that people can build on. The point is to get people to put there stuff in the Google Cloud to become bigger Google customers. Period.

That's why they make it difficult to dual boot and allow all your files to be wiped with a single key. That's also why anything you do on the Chromebook before you login to Google for the first time isn't saved. The point is to make everything on the laptop appear impermanent and to get you to think of the cloud as the place your digital stuff is actually stored.