Isn't it more the case that privacy preservation allows from more sharing of data since it produces anonymised data that actually can be shared? The fact that

Isn't it more the case that privacy preservation allows from more sharing of data since it produces anonymised data that actually can be shared? The fact that they don't share any data is down to these particular researchers, not a consequence of their methods as the entire baseline for the field of medicine is that sharing raw data is a gross ethical violation.