some authors try to distinguish complexity from .. hm.. "chaotic" ? in that, complex means a lot of working parts to form an action chain (or similar) .. contrast to other systems that are not knowable or repeatable, like actual economic systems, or an enterprise of humans doing a business function, including the considerations of humans

Engineers are often taught to simplify and clarify, for great result.. but not all systems are actually decomposable that way .. some schools of business management too..

So a moving, non-trivial, not-reproducible system of systems cannot be considered 'broken' because.. there is no substitute for it to test a fix