Well that's a big part of why we're called Typology Central.
Also, having one big "Personality Systems" subforum instead of a lot of smaller ones would make MBTI, Enneagram, and Socionics threads very difficult to find. And since those are the most popular, it would be off-putting for people who would rather talk about those systems than others.
But I get that, which is why I said popularity over accuracy. The point was that there are so many different type systems that it is evidence that this is mostly a subjective exercise with little hard evidence to back most of it up.
It was just a thought.
PS: or maybe each one categorises a different pattern in the facets of humanity, but that would be awfully convenient.