Well that problem might go away as the latest versions of Word open PDF files for editing by converting them to an editable World file, works pretty well the few times I have used it.
Sometimes PDFs store actual character data (like vector graphics), and sometimes they store static images. Last I checked (admittedly a few years ago), Word conversion only works on the former. It didn't do OCR or anything so dramatic.
If only some PDFs will work for them, they wouldn't accept them at all.
If only some PDFs will work for them, they wouldn't accept them at all.