That bias came from the necessity that engineering work is mostly invisible and you can't completely generalize every concept to fit every project. You need to put in extra work to visualize a graphic that would respond to the state of the system and the concepts you are visualizing might only be relevant to the project at hand. Despite these challenges, when we can visualize certain general concepts, which apply to a wide group of systems, but engineers do a good enough job and rarely are visual designers or UX experts involved. At that point its a cultural issue and that's why I'm grateful Bret Victor is around to advocate better designed tools for engineers.