They are two different tools for different scenarios. Intuition is only valuable when you are experienced in something. Rational thinking, however, can be applied to areas where you have no or little experience.

Say, if a person doesn't know programming, his 'intuition' in programming would just be wild guesses and unlikely to be useful. However, he can still gather facts on programming and think rationally on it, no matter how slow and painful.

So in your original context of your post, I would suggest that we should only use intuition when we have extensive experience in that market or working with the target users. Otherwise, stay close with rationality.