If only they were carrying hundreds of tonnes of some sort of liquid that could be pumped into tanks in different parts of the aircraft to rebalance the weight.
The obvious problem with redistributing the fuel prior to take-off, is that for a flight destination close to the plane's maximum range, the tanks will all be close to full. Take-off and climbing to cruising altitude uses a significant fraction of the plane's fuel, after which optimally balancing the plane during the rest of the flight is part of normal operations.
And of course, you would need to have instrumentation on the plane's undercarriage to detect the loading problem. Halfway down the runway is too late to rebalance the fuel load.