A psychologist asks questions to get through to their patient. Interestingly, they often already know what the answer is going to be, before they hear it. But they ask anyway, to demonstrate a point. This helps things sink into the subconscious of the patient.
A landing page copywriter does something very similar.
They plan content on a deeper level. They don’t just think about what a reader may want to learn; they plan out a way to be in control of the reader. If their content is persuasive, and well written, they can convert simple attention and interest into a purchase.