Uh no Mega, you're wrong. SP is a vital step in the WILD method. While there have been some new variations of the WILD method popping up recently that seem to exclude SP as a step, its vital. Its more of a milestone than anything. WILD is effectively trying to keep yourself conscious while you fall asleep, SP is one of the many things that happens when we fall asleep but are usually too unconscious to remember. When you experience it during WILD, its used as a sign and guide to continue the method and enter a dream state.

As well he said he tried to move his dream body, which he'd still be able to move. And not being able to move the physical body when in SP isn't exactly true. Its really not all that hard, its not like you're totally paralyzed as if you broke your back. If you try hard enough you can still move, and can even end SP instantly if you turn your head in the right way.