It's funny; nobody ever really teaches you how to use your body...but there certainly are right and wrong ways to do things. Walking around in daily life; you certainly can see a lot of people's bad (injurious) body movement habits...that you know will cause them pain and bodily deterioration. Can you imagine how much suffering could be averted just only due to simple bad habits being reformed?
Good observation, and so very true . . . which is a powerful reason for cultivating internal connection, good posture and healthy breathing.