Also supposing in this situation that AI can’t really perform the job duties. If it can, don’t bother hiring either person.
This extends to standardized tests in general. It is often framed around class and race, but I think the real enemy of standardized tests is the "legacy admission" who can't test his or her way out of a paper bag. Ever other element in society is corruptible, people can use their social capital to influence teachers and school administers. Certainly test prep can give people familiarity with the test which helps up to a point but for a certain kind of student the only way to get a good test score is to hire a ringer to take the test for you.
When objective tests are used to assign kids to gifted programs the usual result is an increase in minority and low-income participation because groups that have high social capital are better equipped to manipulate subjective decisions.
The better way to think about this is as having a TA available 24/7, except during testing. This artificial TA should help guide students to gain understanding, rather then simple hints or answer/mistake guiding