Not actually! You can end up trashing the bios on a board if you end up seeing a bad flash! The original bios should be backed up first in case of any mishap.
The other reason would simply be put "why fix what isn't broke to begin with?". The usb download from the Asus support site uses an Asus setup utility to install those drivers for usb. The driver names are not displayed when opening up the zip file download itself.