catchup - what is the issue? Would YOU have a problem with annotating your PLOG with a reason for extra fuel? Is it not also a useful part of the 'on-line' training for F/Os to be given the reasoning for fuel uplifts?
Nobody, especially me, is saying do NOT carry extra fuel. I generally do, sometimes I take PLOG fuel. It is simply that I have always tried to do so for a reason.
I once flew with a Captain who carried 1000kg on a Cavok day 'because it is nice to have a bit extra' and then carried 1000kg on a Cat 3 day - for the same reason. That, to me, is bordering on lunacy.
MJ - interesting questions. Did any answers appear? BTW, PS I did not query the Cavok fuel but...................