Well, lots of interesting points made. As far as I can see they all go to show that spiritual is different to I/P.
Physical, I/P, Spiritual. Three different things.
OK. I think that statement very well underlines your lack of understanding, Graham.
I/P is where the physical and spiritual coincide.
But make no mistake: the physical is the foundation of all spirituality in Japanese arts. For one thing, without the physical, there is no spiritual
or mental. So we must begin with the body.
In budo, whatever you say about the "spiritual" has to be expressed through the body or other people's bodies. So "spiritual" depends on the physical. Otherwise, you're just an invisible ghost that cannot effect anything in the "real" world.
Budo is a process of developing the mind and spirit through training the body. Without that physical training, the rest is just talk, talk, talk, talk, talk.