Because hypnosis is a form of meditation. It opens up more resources… the vast resources of your higher mind.
Personally, I think it’s very “practical” to make decisions based on a combination of logic and intuition. When I have use only one and ignored the other, I have usually regretted it. We have two sides of our brain…and our body/mind is bigger than the confines of our hat rack. Why not use all the tools we’ve got?