To be honest, you don't, really.
The RIV haters will never be convinced it's not an inferior product, and that's fine.
A lot of people look at
DVC as something where they want to maximize resale value if they ever get in a bind or get tired of it (or as an "investment" with appreciating returns, eek).
But, that's just one way to look at it. IMO you don't need to hold a contract anywhere near to end of life to get the value you paid out of it, if you would have spent the cash on similar vacations anyway.