Seriously, this grinds my gears. It's infuriatingly primitive. The metric system is much easier to use, and adopting it would be so practical since everybody else is using it. Who else uses the Imperial system? Myanmar? Liberia?
Some would argue that the Imperial system is just too deeply ingrained in the US. But what about Britain? They developed the Imperial system, and they switched over to the metric system without any major problems. The dimensions of the soccer pitch are still the same, just like the dimensions for American football fields will remain the same.
Is it laziness, stubborness, or what?