Because by knowing which IP is the boot image stored from, law enforcement can locate the source of the unencrypted image, thus making the scheme lose its privacy. The only way to bypass the issue is by manually configuring the IP after every reboot and keeping it a secret.
Because by doing so, law enforcement can manipulate the image from the source by:
Intercepting the payload and modifying the operative system to send data to law enforcement
Pose as the origin of the original payload, and send the tainted operative system to other devices when they reboot
Unless, of course, the BIOS stores the checksum of the untainted image. (Which adds its own can of worms, because that would make legitimate image upgrades require writing the new proper checksum on each server)
Because by knowing which IP is the boot image stored from, law enforcement can locate the source of the unencrypted image, thus making the scheme lose its privacy. The only way to bypass the issue is by manually configuring the IP after every reboot and keeping it a secret.
Why does being able to access the unencrypted image pose such a problem?
Because by doing so, law enforcement can manipulate the image from the source by:
Unless, of course, the BIOS stores the checksum of the untainted image. (Which adds its own can of worms, because that would make legitimate image upgrades require writing the new proper checksum on each server)