I can't really follow this. For one thing, I don't know what "person of enough collective benefit" means (seems like you are missing a proposition or something)

I can't really follow this. For one thing, I don't know what "person of enough collective benefit" means (seems like you are missing a proposition or something). For another thing, it's not true that people are doomed to ignorance, and it seems like your argument probably rests on that assumption. I don't see for a second why you'd say people are doomed to ignorance. We use sense perception to perceive stuff, and we develop a coherent picture of the world (so we learn to reconcile optical illusions, for instance). And for all intents and purposes, that is reality, and it's objective. Maybe there's some other reality underneath that, but then, maybe there are pink unicorns dancing on Alpha Centauri; it's totally arbitrary, and thus irrelevant.