I never said this, so I don't feel the need to refute it. My opinion was not about the absolute difficulty of bodyshopping,(iow I didn't say it was a very easy/easy/difficult/very difficult thing to do).
My comment said that Mr Murthy was not an entrepreneur "along the lines of the startup founders on HN". The qualifier is important.
That said, to address your point, imo, starting a body shop and running it successfully may indeed be difficult, but I would imagine conceiving, building, and sustaining a software product is at least an order of magnitude harder.