Humans are really fast at processing visual information, so when we display part of the programs structure in a visual way it is easier for us to reason about it.
Interestingly enough the “pipes” in cube do not seem to have a directionality, instead the “unify” both cubes connected to it. Okay, it seems like the cubes have some directionality, so if i input a value to the left side of a “multiply” cube it gets multiplied and on the right side it gets divided.