What is the safety risk that is mitigated by sending CASA the pieces of paper and the photograph?
You know the answer. There is no safety risk that is mitigated by sending CASA the pieces of paper and the photograph.
The licence holder goes through the process to end up precisely where s/he started (unless CASA stuffs it up).
It is therefore a completely unnecessary transaction, and demonstrates (once again) that these 'directives' are meaningless gestures.