IMO the reality of the matter is that the vast majority of domestic disasters and tragedies just don’t interest people abroad unless there is some majorly glamorous or exceptional (biggest ever!) aspect to it. How many people in the US or Philippines have even heard of the MV Estonia? If it made the news it would have been for few days max. The Dona Paz is a fixture of the “worst ever” lists but unfortunately there is a major ferry tragedy every few years in Asia and they all blur together. As has been already described the Titanic had a whole bunch of exceptional factors that made it very very memorable long-term, in a way that run-of-the-mill “stupid stuff was done, masses of people died” just does not achieve.