While I do appreciate the cross-species cargo-cult metaphor, I don't think Agile, Scrum and their ilk qualify as engineering in that sense. The program either compiles and does what it says on the tin, or it doesn't. The bridge either stands up, or falls down. Agile et al. are systems for managing humans, who aren't known for responding to inputs as reliably as gears, girders, or compilers.