But from the standpoint of a user, you follow people precisely because you like the stuff they find and upvote.
On the other hand, if there is something valuable to be gained, there are going to be people trying to manipulate it. To counteract that, they have voting ring detectors, but I’m not sure that they can do much more.
In terms of giving voice to the powerless, I don’t think Hacker News does any better. You have people who end up on the front page whatever they write, and those are people with top karma points or people connected to YC, eg influencers. Most of the rest sinks never to be seen again, just like with PH.
For what is worth, I regularly check the upcoming feed, and plenty of stuff from there ends up on the front page a day later.