I'm confused why you think it would be anything else, and why you are so dead set on this. Repos include a signing key. There is an option to skip signature checking. And you think that signature checking is not used during downloads, despite this?
Ok, here are a few issues related to signatures being checked by default, when downloading: https://github.com/flatpak/flatpak/issues/4836 https://github.com/flatpak/flatpak/issues/5657 https://github.com/flatpak/flatpak/issues/3769 https://github.com/flatpak/flatpak/issues/5246 https://askubuntu.com/questions/1433512/flatpak-cant-check-signature-public-key-not-found https://stackoverflow.com/questions/70839691/flatpak-not-working-apparently-gpg-issue
Flatpak repos are signed and the signature is checked when downloading.
It's OK to be wrong. Dying on this hill seems pretty weird to me.
There is no general copyright issue with AIs. It completely depends on the training material (if even then), so it's not possible to make blanket statements like that. Banning technology, because a particular implementation is problematic, makes no sense.