Well, upstream decided to change the default from enabled to disabled. I only helped to make it proper. However, by all the emails I and other support members got lately, it simply shows that almost noone is interested in the reasons behind developer decisions and how the whole Linux community addresses security issues regaring grub bootloader:
https://www.phoronix.com/scan.php?page=news_item&px=GRUB-2021-Secure-Boot-Issues
https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot
So please all, stop whining and consider to start reading …