> Yes, it's pretty clear that humans were overfitting to their interview objective function: comp-sci algo problems.

Worse, it's often over-fitted to memorized specific solutions to esoteric comp-sci algo problems.

So you end up with a bunch of, admittedly smart, developers who all have the spare time to memorize an entire suite of algo problems and solutions.

Some of those developers are going to have copious amounts of spare time while working at your organization as well.