Teacher unions list book bans as one of the primary reasons for leaving. They have data and testimony backing that up. We see legislation and organizations all over America.
Here is a quick article describing the number of books being banned and the effects it has on teachers [1]. It list numbers. There are numerous articles all over the internet from well respected organizations like the NYT saying the same stuff.
The numbers are already presented by them. We see the teachers leaving. We know education is suffering from systematic national pressures from both political sides. Feel free to look it up. hell on first principles, book banning has a direct effect on libraries teachers can have when they include such classics. Again, what numbers do you have? Or just first principles logic to dismiss them at all?
[1] : https://www.nea.org/nea-today/all-news-articles/educators-fi...