Why Make Promises You Can’t Keep?

My question is why make promises you can’t keep? This school is so notorious for making promises that it can’t uphold to. For example, this beginning of the year pep rally. This year first pep rally was supposed to be held August 26th, but was postponed to September 2nd for no reason at all. The school promised us that the pep rally would be held on September 2nd and we could even wear jeans that day for school spirit. Although, of course the school broke their promise and cancelled the pep rally over a petty excuse of “tardies”. For one, I feel like that was just an excuse to cancelled the pep rally because the staff just wasn’t ready or feel like doing a pep rally, but that again that’s just my opinion its not a fact. Even so, if “tardies” was the real issue, then have the staff in the school seen the hallways when it’s time to go to class? the hallway is filled to brim and is impossible to get through the huge herd of people to even make it to class on time. Anyway, this is just my feelings on this situation guys.