I disagree, as does the DOD. Smarter troops do their jobs better, such as better accuracy and faster trainability, and making better inferences. This is what the AFQT , ASVB shows based on decades of data among hundreds of thousands of recruits. Less intelligent recruits are a burden, which is why they are not recruited except during shortages during war time, and only sparingly.

Even if no GED/diploma req., they still must pass the AFQT and related tests