The next question is-
Could the organizers of this showcase have scheduled it on a date that did not make these kids miss a day of school?
Yes, they absolutely could have, but they chose not to, because in their arrogance , they did not care if the kids missed school. It didn't matter to them as long as they got paid.
Don't put the blame on the IMCLA. It sounds like you are trying to find fault with anyone BUT the tournament organizers. | 
