That's because it's unmoderated. Most regular PF posters would be banned by now if it were treated like the rest of HF.
Its more limited moderation as nothing illegal can be posted in there or the attacks on a poster are based on race, sex, sexual orientaion, religion, color, national origion, etc. Oh and going off-topic is not allowed either.
And? Other topics discussed in the politics forum include religion, history, law, economics, etc. All of these are not political per se, but do often intertwine with politics. Science is no different.
Also, would the 'science' forum be only the natural sciences?
What if others want to start a forum on any other topic they choose? You could make an argument for countless more subforums on HF if we're going to make a science one. I mean, I'd like to see a finance/investing forum too.
There are currently 934,100 threads on HF. We're asking for one more board.
It's not like we want a sub section for just Aliens, or drugs, or porn, or favorite movie candy. It's Science! It's arguably one of the most important and influential things in existence and it has world wide appeal.
It's going to be really ****** when I make a thread about the latest advancements in particle acceleration and half of the responses in my thread are going to be "juzmo" or Pokemon memes.
Science is simply too broad a topic to be crammed into another board, or worse yet, a single thread.
What if I made a petition? How many members would I need to justify a new Science Board?