The only thing I can say is that there are multiple data points asserting that it is happening, so I'm not too sure about the insistence on your point of view.

Besides, Asia Miles isn't the only currency of value being trafficked which is causing CX's clampdown in the recent months - but suspiciously most of the fraud has largely been happening with CX ticketed itins and not with other airline partners. Maybe 1) there's something CX should be doing there and 2) rather than blaming other carriers, briefly consider that this is essentially a CX problem to solve given that the lapse causing crediting to be going to all kinds of fraudulent accounts across oneworld has largely been originating from CX?