Why would it not lay on the ground with some slack? There is not enough structure in a normal rope to hold one end of it horizontally, 6 inches off the ground,

Why would it not lay on the ground with some slack? There is not enough structure in a normal rope to hold one end of it horizontally, 6 inches off the ground, and have the rest extend out horizontally, 6 inches off the ground as well. I understand that gravity would be pulling equally on all portions of it, but would not some variation in the material or surrounding air cause it to crumple at one point (or shear, given the weight), or just be compressed until it was laying on the ground? What is it about being a loop that protects it from gravitational induced motion?