I think we have different definitions of the term. All I got from the article was that nothing irreplaceable or critical was being trusted to this launch. It says nothing about how important the cargo is.
On a space station, every air exchange filter, every bite of food, every gallon of water is important
. It doesn't matter if you have enough already, it's still important to get more when you can, unless you literally cannot store it for later. You never know when a technical problem is going to delay the next resupply flight, especially now that there's only one proven system operational.