Sometimes people with severe brain damage in the motor section can lose the ability to walk, yes, but that can also be solved with traditional physical therapy

Sometimes people with severe brain damage in the motor section can lose the ability to walk, yes, but that can also be solved with traditional physical therapy (brains are amazingly adaptive things, and can even repurpose other sections into motor function). Butlike I said, traditional PT is a much less invasive solution to that, so I have no idea what GP is talking about.