It's probably partly just to general laziness on everyone's behalf; but also, there is a lot of flaming and not respecting others opinions that happens in those threads, and that can make someone weary, it's not by everyone it's normally just a select few but if I knew someone's going to attack your beliefs I just wouldn't post in ID at all.

So maybe it needs a different kind of moderating to it, but then for such topics that come out of it it's hard to always be diplomatic.

But anyway, the best way to solve this dilemma is just to make more new threads in ID.