The MBTI asks you what your preferences are, and then tells you what you said. That's not "meaningless," but it's certainly not a tool for doing science. For

The MBTI asks you what your preferences are, and then tells you what you said. That's not "meaningless," but it's certainly not a tool for doing science. For me, it's been meaningful in that it emphasizes that my preferences can be different from those around me, and that that is just fine. It's helpful to consider that some prefer to think for a while before speaking, even if that's not my preference because silence makes me uncomfortable. It's helpful to acknowledge that some people like to make detailed plans whereas I prefer to be more flexible and open to possibilities. The attitude of the MBTI is that neither approach is wrong but that it helps to recognize which approach you prefer. Does each person fit comfortably into one of 16 categories? No, of course not. But it might be a useful framework for introspection and thinking about your relationships.