It's called groupthink. And I've heard many people outside the SV scene complain precisely about SV groupthink issues.
They can be good ideas, bad ideas, horrendous ideas... Regardless, if SV thinks its good, then it passes muster here.
I've said quite a few things that have either scored low or negative, even if they sane and cogent and direct. They just challenge the precepts that are held holy in the 'Valley.