Gut instincts: When should you trust yourself?

The role of our gut instinct as a decision-making tool has been an interesting point for Greek philosophers for centuries. But in that case, why does it feel like it’s been left unsolved? Feeling our gut instinct is a universal human experience that doesn’t seem to be a concept that’s heavily understood. Why? Is it because it’s so irrational, we can’t do scientific studies on it? Is it because it’s so personal, there’s no way we can objectify it?
The great thing about our gut instinct is that it’s really fast- it doesn’t need time for us to sit down and write a pros and cons list. But the reality of that is that we compromise accuracy for a quick decision.