Does your interpretation not mean that(coupled with the court ruling that file formats can't be foia'd) any document with sections cannot be requested via FOIA?

If this format is reused across many files, they might want to give the contents of those docs in a different format from the original.

You have found an argument that proves too much.

Yea coupled with the courts arguments the interpretation of sections in a document as a "file format" means no files with sections can be released via FOIA requests