People who spend 8-24 hours in the ejection seat of fighter/bomber, already wearing a bunch of additional shit, that can’t get up and take some laps around their aircraft anytime they’re uncomfortable and need some adjusting.
It a big enough pain in the ass to get the g-suit on with a bag, I don’t see it working with baggy regular pants. Plus all that additional stuff on them would make it painful. Made the mistake of flying with my keys under the g-suit once, only once.