Attention is a bottleneck; how much real time can we ration for researching each small local event, especially when time is so limited?
For many, the school calendar or budget are the true arbiters of travel, which often overestimate the impact of local events.
A festival, even major, becomes secondary if airline tickets are prohibitive or hotels are fully booked, like my cousin who had to give up on New York for the Jazz Festival because of costs.
The window to travel is already so narrow, people prioritize being able to leave first.