It's not about the charge pump...

RE:774

"Although the concept of using the DC to DC convertor to produce 12 volts is commonly used, shutting the power off as was previously described is unique. In conventional

systems, the microprocessor has a shutdown signal and many circuits will be required to implement control of that shutdown line (such as item 67). The present design strategy avoids doing that because even though that shutdown signal number 67 will in effect turn the 12 volts on and off to the flash memory, to prevent accidental erasing, the charge pump 68 still operating and is inherently inefficient. This conventional approach allows excess power loss, accelerating battery failure."

It's about having control of circuits.....any....

doni