Top recruiters do not tell candidates to just be themselves, review the website, and ask good questions. They prepare candidates around the actual reasons the manager agreed to meet.
They explain the role context, company context, likely objections, behavioral questions, salary expectations, and interview format. They help the candidate practice the stories that matter most, then make sure the candidate understands how to connect those stories to the client's business problem.
This kind of prep does not need to feel scripted. In fact, the goal is the opposite. The goal is to help candidates sound more natural because they understand the conversation before they walk into it.