In any case, I think the Foundation should issue a clear statement that admins, especially from OTRS, can CSD:A7 school articles that do not demonstrate notability. Otherwise it's not manageable.
The purpose of CSD is to delete articles where there is already established consensus to delete. There is definitely not an already established consensus to delete school articles on nobility grounds - there are plenty of people who feel "X is a school" is an assertion of notability.
And as for the foundation dictating such a policy, I think you misunderstand what the foundation exists for...