Why?
NIMBYism is allive and well.
We all have vested interests and naturally one's own points "backyard" is often considered to be the most important.
The QFF Points program is very profitable for Qantas. Without it Qantas may well have crashed long ago. If the QFF had to survive off points from flying it would be dead, and Qantas probably would be dead too.
Change is evitable. Embrace it. Earn points only by flying if you wish, but remember that without the greatly expanded QFF points program that you would probably have no ability to earn points from actual flying on QFF.
Remember too that paid flights are cheaper than ever, and that airlines need more revenue than can be generated from selling tickets alone.