https://www.ere.net/the-problem-with-personality-tests/
This is FAR more involved, but is nonetheless a great resource for anyone wanting to seriously address the validity (or lack of same) of these tests.
https://www.princeton.edu/~ota/disk2/1990/9042/9042.PDF
The table 7 (page 54) data shows how great the mis classification error in this testing is. This is from a 1990 Congressional Office of Technology Assessment study done for Congress. Although dated, there appear to have been no substantial improvements in testing since that time.