The deaths with the highest coverage (apart from suicide) are committed by people upon other people.
Because they have an actor and an object, both with identities, they inherently have stories, which are the product that the news media ultimately produces.
It's harder to tell a story about someone (or even many people) dying of heart disease because there is no "doer".
Assuming no agenda and honest representation of known facts, this will already bias coverage. But since we know many news outlets have agendas and don't honestly represent known facts, this tendency is amplified further.
Because they have an actor and an object, both with identities, they inherently have stories, which are the product that the news media ultimately produces.
It's harder to tell a story about someone (or even many people) dying of heart disease because there is no "doer".
Assuming no agenda and honest representation of known facts, this will already bias coverage. But since we know many news outlets have agendas and don't honestly represent known facts, this tendency is amplified further.