Okay, I think one thing you are definitely and completely wrong about is that PoS is not to make it "One Person One Vote" but that is actually exactly what PoS or PoW is about.
The reason for PoS or PoW to be created is that in a permissionless system you can't make it "One process One Vote" (Assuming anonymity obviously). The only way to do this without KYC is by either making it about processing power (while making sure that it is really really sooooo costly that no one else could simply turn on enough processes to game the system) or about stake.
Since if you want to endanger the consensus, you need enough stake, but if you have so much stake, you benefit from not endangering the consensus more than you would if you try to game the system.

But we can extract this to Steem the same way.
Without KYC if you make it one account one vote, you'd be so overrun by bots, that probably it would be again about "who has the most stake to run all these bots".

Now, I completely agree that Steem should NOT be about rewards, and I think the biggest problem Steem had until today is that it wants to attract people with rewards and not with communities. Most people are here for the money and especially previous to HF20 but also pre HF21 90% of all interaction on this blockchain was about extracting the maximum amount of reward out of here.

While this reduced, I think we're still far from there. Maybe the community feature is going to improve this significantly.

I don't think that downvotes always have to be bad, Stackoverflow has ways to give up and downvotes and I think it is an important feature.
Maybe some people were able to solve a problem in a certain way, but actually that way is not good for you, there has to be a way to push this answer below a "more valid" one.

Back to Steem, now while Steem should OF COURSE not be about the economic incentives, it should be about content, about communities, about fun, etc, but it should be also a part of Steem in the future as well.
Making sure that the user gets a bit back of the platform he puts his data in is just fair.

The problem is always, how are we going to define this.
And my proposal is one of the ways I would solve this. Aligned with the fact that we have a PoS system and aligned with that doing it with KYC is not in the spirit of this platform (besides the possibility of gaming KYC too).