If they knew with certainty they would not be allowed to remain in Europe, they would cease trying.
But they are quite certain to be rescued and admitted to Europe, so they attempt.
Those that succeed in gaining footholds in Europe, will spend lives on welfare. The locals will not be pleased.
That is the situation being imposed on average Europeans, by their central government elites.
Think Dusseldorf rapes of local women, by muslim recent arrivals. That is the gift of Merkel, the EU, Obama and Hillary.