Code may have to compile but that's a lowish bar and since the AI is writing the tests it's obvious that they're going to pass.

In all areas where there's less easy ways to judge output there is going to be correspondingly more value to getting "good" people. Some AI that can produce readable reports isn't "good" - what matters is the quality of the work and the insight put into it which can only be ensured by looking at the workers reputation and past history.