This isn't about teachers using Ai to make their life easier, otherwise it wouldn't only apply to elementary school, and from what I read it applies to students.

Students likely aren't allowed to use AI anyway for assignments. Or are they? That's the question, what is actually being banned if anything

"Students likely aren't allowed to use AI anyway for assignments"

This can be reduced to "Do students have access to a phone". Good luck after 12 years of age with that. That is a tough war.