Anything simple is false
The more you know about a situation, the harder it is to talk about it in simple terms.
My brother has been repeating for years the same quote, from Paul Valéry: “Anything simple is false. Everything else is not usable.”
It took me a long time to understand the truth behind those few words. They describe the impossible challenge of trying to communicate clearly about a complex situation.
When you try to simplify something complex, you are slowed down by an internal voice reminding you how much information you’re leaving aside. Small details that make a big difference, distinctions that matter, precisions that is there for a reason, etc.
And yet, a truthful representation of a complex situation can carry even less value for the person receiving the information. When exposed to something too complex for them, people immediately turn on their defense mechanisms and either ignore the entire message, or pick and choose one random part, that they can digest.
Balancing both evils, I think you can solve the dilemma by paying attention to your message and to your audience. What is THE critical information that must you pass on? And what level of complexity does your audience already master?
Once those two elements are clear, you should be able to judge how much simplification is required.
For the remaining details that won’t make the cut, you can follow the ancient practice of Irish storytellers: “Never let the truth ruin a good story.”