When Tatsumi Hijikata performed the weakened body in his last performance called Quiet House, he was in reality performing the vaporized body. Vaporization is the potential, invisible world body, which is of endless qualias. In the vaporized body performance, there are two things taking place: (1) The 3d world body that appears weak or in ash body/freeze/statue; (2) The multidimensional invisible world.
Quiet House had many qualias and characters involved, but the audience may have only perceived a very limited movement weakened body. If this practice appears pointless to perform in front of an audience, note that even the most subtle feeling inside the body may microexpress enough for the audience to maybe feel a difference even if clueless from where it came.