[frumplestlatz]

Declining to buy and stock a book in a school library is not a ban at all.

The book can still be printed, bought, and read. It can be brought into that same school, and read there. It’s not banned.

[amanaplanacanal]

If the school declines to put a book in the library, that's not a ban. If people outside the school with power over the school demand that books be removed, that's a ban.

The groups demanding books be removed are often not even parents of children in the school. It external parties driving this stuff.

[frumplestlatz]

Removing a book from the library is not a ban any more than a publisher rejecting a manuscript is a ban.

Declining to provide a book is not the same as prohibiting the possession, use, or distribution of a book.

As for “external parties”, schools in the US are public institutions.

[amanaplanacanal]

If rather have folks that are trained in childhood education doing that job than randos.