Yes. There's a definite undercurrent bubbling on this thread as well whenever migrants are mentioned.
Irritation, probably.
The difference in discussion activity isn't because people care less about dead migrants. It's a reflection of the fact that this submersible emergency is a rare and ongoing situation with lots to learn about the engineering and so on. People want to understand the equipment, the options, the purpose of the original dive and so on.
It was the same with the boy down the well in North Africa, the football team in the caves, the miners who got trapped...
What is there really to say when news comes through that a migrant boat has sunk with hundreds dead? It's just unspeakably awful. With no hope, nothing complex to understand, no ongoing rescue effort. What can anybody discuss for hours about that? It's just unbelievably tragic.
So popping up on threads about the submersible periodically and weeping "won't somebody think of the migrants?" just feels in poor taste, frankly. It's not an either/or. Interest in one doesn't imply indifference to the other. There's no connection. It's a weird, virtue-signalling game of ethical equivalence to be playing and it doesn't reflect well.