Whale strikes are a real issue, and it's not just cruise ships but also all other ships. Whale-ship collisions are currently a leading cause of death for large whales, and scientists estimate that over 80 blue, humpback, and fin whales are killed by vessel collisions on the West Coast of the United States each year. There are efforts to try and mitigate this and keep marine traffic informed - https://boi.ucsb.edu/active_projects/whale-strikes