Yes. Authenticity depends more on where the thinking comes from than who physically types the sentences.
An executive can spend 30 minutes discussing an issue they understand deeply while a writer spends several hours turning that conversation into a polished article.
The final wording may belong to the writer, but the experience, argument and perspective can still belong firmly to the executive.
Problems arise when the process works in reverse: a writer invents a generic opinion and asks an executive to put their name on it.
That may produce content, but it does very little to communicate genuine expertise.
Good ghostwritten thought leadership therefore requires access.
The writer needs enough interaction with the person to understand what they actually think, not simply what somebody in their position is expected to say.