Yes, you may repair it if you want, that's never been the issue. But then don't come back asking for free service or free replacement parts when you can't fix it or when it breaks next time.
The manufacturer has no moral or other obligation to provide help, info or assistance beyond conditions under which I've sold the device or equipment. If you don't like a deal, find yourself a better one.
The problem is precisely that you can't repair it even with all the skill in the world, because the schematics aren't documented, the components aren't for sale and the components are software locked to the device. That's what right to repair is. Just like you can repair your own car by buying the components and doing the work yourself you should be allowed to do this for everything you buy. No one is asking manufacturers to repair your device for free or give you components for free.