Sarcasm aside, while still not acceptable, some people might not have the means to buy new items to replace what they lost in a crash. So it is understandable for some people to make the choice of taking their luggage with them in such an event, as they might not have the wealth and/or insurance necessary to replace those items afterwards.
Of course the solution would be to make airlines liable to replace passengers' luggage in the event of a crash and inform the passengers that they will do so, but that's not how the world works currently.
Of course the solution would be to make airlines liable to replace passengers' luggage in the event of a crash and inform the passengers that they will do so, but that's not how the world works currently.