How upvotes/downvotes work is actually a rather interesting topic.

The reason subs like circlejerk, fph, politics, etc keep getting to the front page isn't because lots of people agree/disagree with the content. Instead its about time/early votes. Basically just a handful of early upvotes or downvotes will send a post spiraling into success of crashing into nothingness.

This is why reddit vote bots and alternate accounts work so well. The first 5 upvotes count for more than the next 20+ downvotes that come a short time later. Not because upvotes are worth more or less, but because of the timing which gives early votes more sway/meaning.

Then this system of giving earlier votes more sway is tied in with general psych which will have people simply follow the herd. This means those first few votes kicking it off leads to a giant inflation of votes that grow on eachother causing more votes.

The end result is that it would take a rather organized group downvoting content to get it off the front few pages of r/all. Especially if they don't end up seeing it until hours after it was posted by then any downvote to it is more or less powerless thanks to the time weighting system in place.

So things like r/circlejerk and similar echochamber subreddits are "very powerful" are making there voice heard on r/all. FPH was no different it had arguably the most tightly controlled user base of any subreddit that required sub'ing to post and all sorts of things along with a verification setup and so on. One of the main rules was "no dissent" this led to the generally snowbally voting setup mentioned above and having FPH content consistently hitting the front page.

This is why subs like leagueoflegends, politics, etc tend not to hit the front page as often. Because there user base while large will disagree. They will go "oh its about X team, fuck them" and you will get immediate downvotes. "Oh it looks good for X political party, fuck them!" and boom early downvotes ahoy! By having a subreddit that by nature encourages more than one viewpoint you are less likely to snowball onto the front page, that doesn't mean its impossible (far from it) just less likely.

Hopefully you learned something from this, maybed you don't give a shit and thats fine too. But the simple TLDR is that not all upvotes/downvotes are weighed equally and the setup gives "echo chambers" more power.