Also this bypasses the protection offered by Bitlocker (in the typical ‘keys are stored in the TPM’ setup) as it grants access to the system from the login scre

Also this bypasses the protection offered by Bitlocker (in the typical ‘keys are stored in the TPM’ setup) as it grants access to the system from the login screen without entering a password. So if you steal a laptop you can get at the drive contents using this trick.