The old "Gold Standard" for WYSIWYG programming has been Apple's Interface Builder. But every iOS dev I know has moved entirely away from IB in favor of programatic construction of the UI (in Swift or Objective-C text). Why? Because they want to have automated tests over everything they can.
The simpler way to say this is: "Complex ideas can only really precisely be expressed in text. To the degree you can express them visually is to the degree that there are expressed as complex text underneath."
The simpler way to say this is: "Complex ideas can only really precisely be expressed in text. To the degree you can express them visually is to the degree that there are expressed as complex text underneath."