I don't think it's quite like that. Sure, lots of posts get unnoticed and there are hidden gems to be sure, but that is not the majority of them. Lots of the posts that get buried are also, quite honestly, not up to snuff in a few ways. I think the best way to help new content creators is not by letting them get buried without a peep, but by leavings comments that may help them improve.

Don't upvote what you don't like for the sake of it, but do help those with potential improve - it will help you in the long run!