Are you as really as dim as you come across.
perhaps not as smart as a qantas skygod like yourself
but....
The legal and proper purpose of logging ICUS/AICUS etc is to accurately record the flying of a co-pilot/first officer/or as may be the case, when they are pilot flying, acting in command under supervision.
so bloggs logs his icus for each sector he flies. unlike the logging of co-pilot time (which is halved) icus goes in the book one-for-one. therefore bloggs gains his atpl quicker than what he would have if he were only logging co-pilot time. he then continues logging his icus to reach the 2000hrs aeronautical experience required for a command. again, he reaches this quicker than if he were only logging co-pilot time.
doesn't quite sound the like the
The legal and proper purpose of logging ICUS.