It's just a cool opportunity to learn about how the ship operates. Not the engineering part, but the hotel services (restaurants, bars, laundry, guest services, etc.). You can ask questions.
I've been to a few Meet & Greets where people ask all the wrong questions. The officers who show up are not the right people to ask about how they will handle an emergency like hitting an iceberg. For that, watch the movie "Titanic"!! Generally the captain and the engineering crew will not show up. It's the hotel & guest services staff who show up.
Ask about how many people it takes to put on dinner for all those guests, or how many pounds of bananas are needed each day of a cruise, or or how many years on board it takes to go from cabin steward to head of hotel services, or who you should contact if there's a loud party in the cabin next door to yours.