Eh, that's just arguing about semantics, using a different definition of "details" than the GP. And note that many of the details you see in the periphery, your brain simply reconstructs from having previously looked there (and indeed continuously and subconsciously moving your eyes in saccades, collecting a patchwork of detailed information for the brain to stitch into a whole), including colors. You'd be surprised how many of the colors you see in the periphery are entirely filled in by the brain.

From a survival perspective, our peripheral vision mostly needs to do one thing and it indeed does it well: detecting moving things. The moment there's unexpected motion detected, we instinctively shift our gaze there to take a better look with the foveal part of the retina.