New Zealand is quite stringent on the number of immigrants it allows in the country each year. In most cases, immigration to New Zealand even requires being under the age of 55 and being a skilled worker.
Add yes, people dying in the Mediterranean is is a human tragedy, but that still doesn't mean that everyone who wants to come to Europe can do that. Who is gonna support them financially, with housings, healthcare and so on?
Frontex aren't the one killing migrants. The human trafficers in norrthern Africa are the ones responsible for putting them in overfilled boats that aren't barely seaworthy.