If there is ANY relationship to engineering here maybe it's like reverse engineering a bios in a clean room, were you poke away and see what happens. The missing part is the use of anything resembling the scientific method in terms of hypothesis, experiment design, observation guiding actions, etc and the deep knowledge that will allow you to understand WHY something might be happening based on the inputs. "Prompt Engineering" seems about as close to this as probing for land mines in a battlefield, only with no experience and your eyes closed.