It's not that your idea doesn't have merit. It does. I went down this path myself, in the beginning.

But if you game out the implications of this, the conclusion is that everyone will see a different front page. And that has a bunch of subtle implications.

Reddit tried it. It could work. But it makes for a divided community, or set of communities. You see this with the various subreddit wars.

Do you have an email I can chat with you more about this? Hit me up if you're interested.