I used to feel the same about this as you do. But as it turns out, I no longer fear to upvote a less great node. Indeed, I can't state thee difference in appreciation from me, but OTOH it turns out that fewer other people will upvote the less great one. So it pans out in the end.

What I like less is that nodes that fewer people have seen, such as more recent nodes in an older thread, consequenctly get fewer votes. Sometimes, the difference is huge. And your proposed solution won't fix that.