Earlier quoted context omitted.
You waste your time managing visual presentation (more so than 1D text). Schematic entry used to be commonplace for FPGA and ASIC development in the 90s. The industry has mostly moved to HDLs for digital logic because it is more productive and you get side benefits like revision control, easier reusability, and tooling independence. Anyone promoting 2D visual development for programming is selling snake oil.
We're not talking about programming here but explaining a concept.
Granted, code requires far more details than many conceptual explanations, but it is still one.