You're forgetting: health.
Just being able to get off the couch, pick up kids or grandkids, walk up stairs, be less likely to need a hip or knee replacement, run around for a social soccer game without worrying about popping an ACL, and so on. Now, for health a person doesn't need to squat 200kg, and they sure as shit don't need to do 100 reps. But they do need to squat.
Some of you need to look beyond your own training and past the studies to see what most people need. Some of you get it, some don't.