My interpretation of the presented material that no, difficulty doesn't matter, "available resources" too, "impact" - well, the impact you should strive to is e

My interpretation of the presented material that no, difficulty doesn't matter, "available resources" too, "impact" - well, the impact you should strive to is exactly the reduction of the most critical risks. Using the example from the linked material: surely if you can't swim, learning may be quite difficult.