I think "no-AI" policies are really just ways of gatekeeping low effort contributions from people who have no idea what they're doing. This is a good thing!

To use the current example of Godot--game engine development is really, really, __really__ hard. Building on your engine in a way that doesn't lead to performance regressions, introduce subtle bugs, etc. takes a lot of know how.

If you care about quality and performance, then rejecting work from people who aren't capable of understanding how their contributions impact the greater engine as a whole is a logical choice.