What Rubbish
You obviously don't know the history of the Airbus FCTM. CX wanted to write a FCTM before the Airbus document was conceived. Two CX STCs went to Toulouse and worked with Airbus to write the very first FCTM. It was only after they had finished the job, Airbus decided to issue their own based on the CX product. This is the fact.
You should ask the two very respected STCs how hard it is to write an operational document from scratch.