@MeanwhileinCanada that’s because the migrants are already dead and the reason/blame is pretty easily laid. (As unpleasant as that sounds)
Whereas with the other you have Schrödinger’s #submarine .
And who doesn’t want the answer to that one? Plus people are a bunch of grisly bastards. Evidence; every car, train, plane crash or natural disaster/war ever. And before anyone blames the media just remember there is always a big crowd outside a house fire. Media are just the drug dealer.