I like cargo shorts with pockets, because I like to keep my ziplock with TP in them, and my map, and my camera .
Its a ~5.5 oz penalty I gladly carry. I think mine weigh 9 oz, versus about 3.5 oz for running shorts.
Yes, it counts in FSO, it has an effect on you too. Does it make my pack lighter, yep. All together about 6 oz lighter.
But if my pack weighs 7-8 lbs, im not worried about that 6 oz. Those are items I need frequently, or dont want to dig thru pack for when I do need them.
I, am the only person who knows, and who cares, what MY pack weighs.