The original ground setup was a matter of economics, not good design. It's cheaper to manufacture a couple of short braided cables than one long, heavy one. Adding a couple of potential high resistance connections that carry starter current to a circuit is beyond stupid! It's much smarter to use a long, heavy ground cable from the battery to as close to the starter housing as possible, and use the braided strap to carry lower current circuits from the body and/or frame back to the battery. This situation is just one of many where the bean counters won the battle.
Jerry