Pressed to answer, I would say, no, I’m not that bad at Illustrator – it’s only I would have to create every element in the diagram from scratch. 

Google Docs provides a library of readymade elements, which cuts down on the time. Also, the library suggests they anticipate their app to be used to create flow charts such as this one, meaning everything I would need to make such an image was there, increasing efficiency. Props to Google for so thoroughly anticipating user needs. 

Secondly, Google’s experience with user interfaces (like SketchUp) meant that intuitive actions like grouping meant that I could put together shapes and move them around without having to explicitly group them, which was a bonus. 

So yes, Google Docs is AMAZING, but it helps if one knows what one’s doing to begin with. 

(BTW, this diagram illustrates the syncing relationship between Google’s cloud services and an iPhone and MacBook).