Yes, this is a practical approach in most cases.
In our day, despite so much really good, readily available published material and so many getting a good Torah education, there’s still a powerful role in our lives for the local posek.
Just consider the example of a published halachic work. There are financial and time (to write, edit, publish and distribute) constraints. It’s just not feasible for an author to think of let alone cover every imaginable custom and exception.
Even were such a thing possible, the resulting tome would be so huge that just searching for a specific ruling would be a daunting and time consuming task.