Of course people die of cancer, as in die as a result of the disease process. Solid tumours invade healthy tissues, compress vascular and nerve structures, cause bleeds and swelling, and "crowd out" the metabolism of other tissues. I suppose, for example, that airway obstruction from a massively bleeding central lung tumour could be viewed as a "complication". Of course, tumours in the head have a certain tendency to compress brain tissue, causing a variety of symptoms up to and including brain death. And I say all this without even mentioning leukemias or lymphoma.
Anyway, that was something of a questionable statement.
