>>1632299yeah, well the harness can be optimized.
but watch a big cat run, watch a bird fly - it looks smooth, elegant, power conserving.
now watch a person run, a normal person - its unelegant, momentum is destroyed with every step, load spikes on the joints.
my proof: check out modern running shoes.
to run and walk for longer, you need literal dampers what you put on your feet, othrwise you blow up your knees in now time.
this is proof enough - an animal made for running upright would NOT need devices that dampen the load spikes with every step. dont simply insult me, try to at least think about what i'm saying for a second.