It is a tragedy of the commons scenario. The individual actors have no conscience or plan, of course, but it all amounts to the same: some cells can morph into freeloaders and those that morph into the most aggressive replicators "win" in the short term.

Unless perhaps if the cancer is transmissible.

Yes, quite. Sometimes it's too successful and outstrips its resource. Sounds familiar.

If you have a word you prefer I invite you to use it in the future.

I have been using "cancer", but "carcinoma" and "tumor" are common.

Those terms are not interchangeable.

Some cells survive the death of their organism. Like the HeLa line of cells. There's an interesting and tragic story behinds it too...