Because users have attendees leaking meetings and asking Zoom if there is any way to identify the leaker. This in turn informs Zoom that the ability to identify leakers is a desired feature for users. This might make the product seem more "secure" and "safe".
Since when is protecting privacy shady? There are a lot of confidential relationships that previously relied on meetings behind closed doors that now rely on teleconferencing: therapists, healthcare, courts, lawyers, students, etc. Those who are exposing their private information in confidence absolutely deserve to be protected.
Any of them, given the tools exist to do so. Also, the organization that is attempting to protect from the leak might not be the same organization that would be recovering from one.