He's not being blocked from repairing it, and he doesn't need to hack it.
He just needs a part. (They did eventually send it to him.) If they had not, he doesn't need the right to repair it, rather would need someone to manufacture the part.
>He just needs a part.
Right to repair, in a broad sense, also covers access to parts. This is definitely an edge case and we might want to just consider that if we're going to do experiments on disabled with the aim of helping them, and they want to continue using the tools, we might have to subsidize access to the parts until they die.
But is a compelling reason to have solid right to repair laws.