its actually a personality test, that ideally should be designed to be well-suited to filter out personality types that tend to be successful at the job.
The scandal was coaching people how to pass the personality test. That's just a waste. You end up getting people who are a bad fit for the job, and will ultimately not be successful long-term
For instance, I will ace any aptitude test at 99.9%+ percentile easily (I always do at any standardized test, SAT, GRE, MCAT etc). Yet I would be a terrible terrible fit for ATC. The level of detail-orientedness it needs day to day for me would be a challenge. I can do it for short periods of time of absolute concentration, but my god, there is no way I would last at the job long-term. Training me would have been a waste of scarce resources. But I know several people that such tasks energize them and may not score as high on the aptitude test, but would be a better fit for that job long-term
If done well, including personality test could have been a good way to produce better outcomes, and increase the early part of the pipelines by opening it up to more people than just CTI grads.