[lotsofpulp]

Employers are interested in grades, just not directly. The higher education institutions from which they hire from are the proxy for grades. The target schools for attaining employment at certain firms and other graduate schools do the job of weeding out those with low SATs or grades or the wrong type of background.

An invididual's letter grades are not important, but selecting from a cohort of individuals that outperform others is important (also why it's important to be from that cohort). You're not aiming for every single hire to be successful (probably not practical or possible to invest enough resources to be able to evaluate that), but you can make the odds tilt in your favor.