I for one, don't think the benefits of having a publicly viewable human relationships subforum outweigh the costs, trap. You also seem to assume that attracting more members and views to our forum is inherently desirable...
Next to what Anthile said, I would also like to add that 93.2% of the threads there are created by people that joined only to have their issue solved, and never engage in any other thread in any other part of the forum. It feels like being used, it's insulting to us. That's not the kind of members we want.
And there is also the extremely high tendency of said noobs to know next to nothing about MBTI and thus to use their terrible misconceptions of it in all the wrong ways, and therefore only contributing to giving it a bad image, which makes Baby Raptor Jesus cry and provokes massive amounts of facepalming.
We want quality, not quantity, and historically the human relationships subforum has so far provided very few quality stuff. If less people can reach it, but the few threads that are created are actually worthwhile because they are made by members that have already spent some time in the community and learning about MBTI, then I think that's best.
If someone really wants to better understand INTPs, they should read the INTP section (and the rest of the forum) for at least a couple of weeks, try to get to know some of the members... Not join without even lurking a little and post a thread hoping for a 3-day crash-course quick-fix and then never come back...