Debian is huge - that's why so many other distros use it as a base!

So, yes, all those packages are maintained either by an individual Debian Developer or a team of them.

There are third party repos, but they're (currently) neither as widespread nor as commonly-used as those for other major distros. This vote won't affect them, and you might potentially expect to see their use grow if one of the harsher options in this GR were to pass.

The point though, is that they package 3rd party applications and libraries.

If they ban AI, they won't stop packaging apps and libraries from parties that do use AI. They wouldn't even know who does or doesn't.