Originally Posted by
Zaqwert
Being weak (physically, emotionally, mentally, you name it) is very bad for survival. Strong people are way more likely to survive, way more likely to breed, etc.
Modern, developed societies are relatively new, having been around for at most a few thousand years (or less, depending on how you define modern). As opposed to the scale of human evolution, which is over millions of years.
Modern society allows for weaker individuals to survive when historically they wouldn't have.