From time to time, we create or find reference material that is so useful, we do what is necessary to make it available to everyone.
The diagram shows how simple, every day language is changed into "academic" style we think is perfectly clear. But about 40% of adults cannot easily understand it . Especially people who don't use English as their first language.
The "academic" style takes people out of the discussion. (Technically: we form mental perceptions - abstractions - without people by changing one part of speech into another — not just the occasional word, but many words.) When we make assumptions about the literary and language skills of our audience, we cut off parts of our audience. Think about it.