PC Death

What PC Death often looks like from the DM's PoV

It's often suggested that PCs should only die when the death is a direct consequence of their decisions, as opposed to a run of dumb bad luck or a "save Vs death" trap or somesuch.

While I agree in the broad sense that PC death should not be whimsical; all PCs generally do share the same decision of "Let's go and face the danger" for whatever reasons. So in that sense no PC death is really the result of dumb luck etcetera any more than knowingly walking into a minefield and actually stepping on a mine is just bad luck.