"Willing" is such a weird line in the sand to draw, because it isn't even intent. It's theoretical intent in a theoretical scenario. If my leg was blown off, I'd do physio-therapy to get my mechanical one working in unison with me as soon as possible. "Willing" to do a therapy is weird. Maybe if my leg was blown off, I wouldn't want to do physiotherapy? I'm not in that position. In my healthy position, I'm willing to do the theoretical.