A good analogy borrows a structure your audience already owns and lends it to one they do not — and every analogy breaks somewhere. Stretch one step by step until it stops being true, plant your stop marker, and say the breaking point out loud. Then clean a mixed metaphor down to a single image and finish it.
Pick a comparison
Stretch it — each notch adds one more mapped part
Naming the breaking point is what separates teaching from hand-waving — and it buys enormous credibility with the experts in the room, who were already composing the objection you just made for them.