The success of Tourism Australia's culinary promotion and luxury branding is based on how the stakeholders are all aligning around the message, as much or more so than the actual travel product itself.
When you operate enough ships to comprise half of the global cruise industry, it makes sense to leverage that scale to increase efficiency and savings. It's actually shocking that Carnival Corp. took so long to do so.
Thailand's tourism has been a mess for years, it's just that so many people were coming despite its problems that nobody noticed. That's not an issue now.