What I don't understand is how a new sub forum would hinder you doing the above?
I use the new post button almost exclusively, I'm also experimenting with ignore threads. Previously I had a bunch of members and forums on ignore. It is a rare occasion that a political thread interests me but that said, subjects relating to the 2A do.
A new sub forum for politics and one for 2A would allow me to bulk filter what I don't want to read but make no difference to those interested in politics. At the end of the day it's a convenience. But if I've been smart and not looked at the forum all day, hitting that new posts thread might not be 4 or more pages long and I'm just not going to look through all 4 pages to decide what to read meaning I'll read more which I'd guess is the forums wish.