OK. The caller may or may not have been teachable in the moment, but I do want to suggest another metaphor. First, let me digress to Johnny Cash - yes, it's relevant.
Soooo... the whole is greater than the parts.
Halfway through the song, our intrepid factory worker ends up with a load of parts. Tires, motor, transmission, driveshaft, headlights, seats, etc. - they're all in the garage.
Is it a car?
No. it's a random assortment of parts. And unless it's put together in a very specific manner, with parts in a specific relation to each other, it won't move as one unit, under its own power.
A car, properly assembled, can do things that all of its component parts, in a random pile, or even improperly assembled, simply cannot.
A team, working together, can do what the same number of better players, doing their own thing, cannot.
The whole - a single entity created of multiple parts working together - is thus more than the sum of its parts.