We're still a herd mammal inhabiting the surface of this planet. Showing weakness is how you get killed, since many of us still eat each other as a source of food. Fellow humans help cull the weak, because it typically plays out as a defect that's unwanted in future humans. The benefit of strength is surviving, and passing along ones genes to the next iterations. There's also a "body-feel" to strength that's undeniably pleasurable.

And why humans seem to hate their own freedom and love government?

Herd animal. Remember the shape of the bell curve for IQ, and how there's only a tiny fraction of humans who can be considered intelligent. Trudge up that slope to the left and you'll begin to encounter more and more instinctual behaviors, along with a mostly unrecognized need for 'guidance' from a superior IQ. In this case I think the 80/20 rule is wildly optimistic, and the 20 is more like a single digit that's just a straight line.

But that's just a gross overview, and actual conditions on the ground are extremely variable. Your weakness will get you beheaded in some places, while in others it will get you an EBT card.