And you might miss the one really relevant one (to you) that perhaps didn't get a lot of posts (so it will just drop off).
It could be on page 4 - so you'll probably never see it.
Viewing from the QB Forum home page just lists, by section, the threads with the most recent posts.
So if someone posts to a thread that's been dormant for 2 years, it is no at the top of the Main page.
Realistically, there are ~15 new posts on a given day in a forum.
So even if you don't see it right away, but view it hours later, your post will probably on the first or second page, because the majority is viewing through the home page OR reading via the digest.
Which means they don't even know the thread exists.