Regarding the RS:X, if it wasn't picked as the Olympic OD, how many folks would actually buy it? I would think that it would attract even fewer folks than formula, if any at all. At least with formula equipment, there are many folks out there that sail the stuff for fun outside of a racing focus.
With respect to earlier comments about formula biasing those with a particular body type, that could be true, but that can be said about many of the sports in the Olympics. How many big gymnists do you see, and how many lightweight shot-put contestants does one see. I could go on and on, but I think one can understand that many Olympic sports favor certain body types.