UX is not just about the IA. It is about empathizing the user’s needs.

As you can see, there is a good reason it is called User Experience. Understanding the user’s needs is the basis of creating the most effective user experience. There must be a deeper understanding of the user’s mentality, likes, dislikes, and behaviors. Doing this will also help when you design the product and hence will reap more benefits and provide a better experience to the user.