This list seems...odd. For instance, the list decries the permissive AI policy of the Linux kernel, of Fedora, of Bazzite/Bluefin/etc...and then includes Secureblue as an alternative...?

Secureblue is a neat project, but as you say, this would make more sense as a generic discovery list. If you want to avoid projects with a permissive AI policy, you should probably take into account that Secureblue is based on bluebuild (from the Bazzite team), Fedora, Linux, etc etc etc.