I see this as a broken cable, not a miracle. The brain still sends the order.
The wire in the neck does not. Neuralink is the bypass.
Physics already said yes. The hard part is the implant that stays in and keeps working.
"It's a communications bridge. You bridge the motor cortex past the point in the neck or spine where the nerve is damaged.
From a physics standpoint it is possible to restore full body function."
-- Elon Musk