Genting passengers were "burnt by the collapse / bankruptcy of the line & the many many passengers that were & are out thousands of dollars in booking payments". There are no A & K passengers yet.
Many new cruise lines have received (and future passengers have gladly paid) deposits on an unknown product (for example, Explora, Ritz Carlton ((just recently actually sailed)) and Four Seasons in the near future). Those people made intelligent decisions based on known factors (A & K, Ritz Carlton, and Four Seasons' history of providing a first class product).