Cruise ships tend to have the name of the captain widely promoted, so it's trivially findable public information. The same is not true for random freighters. And Schettinos name was widely broadcast because there were clear points to criticize his and the crews specific behavior (which we do not have here), which lead to death of a bunch of people (which we do not have here). It's a really odd point of comparison - there's plenty of nautical accidents where this isn't widely reported because it's not especially interesting and there aren't immediate reports of the captains misbehavior to report on.
