Again, this goes back to “someone who is doing critical time-sensitive work must have supplies on hand.”

Anyone who runs out of color ink presumably could run out of black ink or run out of paper, too, because they weren’t keeping necessary supplies on hand.

So really the only cognitive adjustment they need to make is to tell themselves “this printer requires two cartridges to operate” rather than making a blind assumption that it will work with just one.

I would be surprised if this wasn’t already disclosed in the user manual as well.

The psychological justifications don’t matter. This is how the machine works. If you don’t want that machine then you buy a different printer.