I believe OP is implicitly saying "Most value systems [held by people you interact with on a daily basis] are equally valid". That's very different from the set

I believe OP is implicitly saying "Most value systems [held by people you interact with on a daily basis] are equally valid". That's very different from the set of all conceivable value systems, and it's a lot easier to imagine the mechanisms by which the limited case holds (i.e.: people are pretty good at selecting valid value systems).