Cancelled events due to "unforeseen circumstances"

I would like to open about what is the basis of the organisers to cancel the event, not because of travel issues or health concern of the artist or force majeure.

I remembered Ni-ki (Indonesian artist) disclosed the comprehensive reason for cancellation, because of the target quantity is not enough to justify the expenses for the logistics, security and labor.

I wonder if that is the same for past cancellations. What is worst is that the organiser doesn't disclose and provide update that the event is already cancelled.

Example: Gayle and Sasha Alex Sloan, each at 800 pax Podium tent, cancelled their respective event. Another is for Conan Gray and Kylie Minogue recently.