Most of this is noise; the impact of local events on trip planning is often a conditional consideration and not a universal determining factor.
It is necessary to exercise some control over information, distinguishing what is truly relevant from what is secondary.
A business trip to Paris for a specific meeting will not be fundamentally altered by a music festival unless the directly controllable logistics (transport, accommodation) are impacted.
Discipline involves focusing on what is relevant to the main goal of the trip and ignoring the rest.