I guest this update is not useful for someone who does not have a USB Flash drive, SD Card, or a computer or laptop.
Plus, the steps like booting into safemode to manually update it, and making a USB drive can be hard for the non-tech savvy.
I think a bootable repair CD would of been easier for many users, and more people probably own a CD burner , and burn a CD than a USB flash drive to prepare the repair drive.