Why is this a manual process? Is our technology not sufficient to build a plane that can detect when it has too much weight on board for a safe flight?
If OP is right (pretty sure he is), he said that by using something completely free (average weight), we were able to achieve like 50+ years of safe operation of largish commercial airliners. That's amazing.
Also, the problem isn't too much weight per se, it's weight distribution.