Allow you to set graphics preferences before launching a game, so you don’t end up with a tiny 480p sized window on a 4K screen during an unskippable (and unrepeatable) first-launch cutscene; or the reverse, you only see the 1920x1080 (or smaller) cutout of the center of a 3840x2160 image.
Developers tend to install a lot of little things (without any research into the trustworthiness of those things), that then never get patched and lead to an ungodly pile of detected vulnerabilities to clean up.