Yes, All you need is the Air, You dont need nor want a training partner either,
WC takes a very minimalist approach to training; there is nothing there that doesn't need to be there, so SNT is a very necessary component, and I would say most people don't spend enough time on it unlocking its "secrets".
But to throw out the other forms, the chi sau, etc. is plain wrong. Not because it's my opinion, but because it was the opinion of the people who developed our system. They knew more about fighting and how it pertains to the human body than most of us will ever come close to; so to throw away their roadmap is either laziness, ignorance or hubris.