You don’t always have the luxury of time, tools, experts, measuring devices and focus. Sure the engine doesn’t run perfectly, but then again you don’t need it to run perfectly – you need it to run well enough to do its job so you can focus on bigger problems. You’re also unlikely to ever know everything about a given problem, especially under constraints.
Intuition is useful in the moments when we need to act fast, and when we have the experience necessary to make something that’s good enough for now.
It’s also useful to determine when those moments are and what to do with them – because even if we don’t have any information about a problem, we certainly have plenty of information about ourselves.