The saying goes: Keep it simple, stupid. I was surprised to hear that the New York Times writes at an 8th-grade level for its readers. It’s no surprise that 50% of Americans read at an 8th-grade level or less.
I’m also going to guess that the 50% of readers at that level don’t often pick up the Times.
What you write and to whom is a choice. And if the choice is to keep dumbing down the work, eventually, it gets dumb to read. The alternative is to simplify what you are trying to explain.
Simple doesn’t mean dumb. In fact, it’s the opposite. Explaining ways so that a 4-year-old can understand means enrolling everyone so that everyone can be on this journey.