Perhaps you’re correct. Even then, destination and timing matters. In the middle of the summer, going somewhere in Europe, it should be no problem. Huge NCLH pool. Shoulder month or lower used area, the tickets might not be there.
Bulk discounted rate plane tickets are an entity of their own with multiple organizations, including cruise lines, chasing a limited number of such tickets. If travel remains as hot as it is currently, and the specific airline issues don’t significantly decrease, it is easily predictable that the number of such seats available will plunge.They may have already done so.