Quick lesson: it is true that searching for local events can be very useful to validate a destination, but its importance is not constant.
One must observe that influence depends heavily on the type of trip and expectations; it is not a universal truth.
For example, if you plan a solo hike in the Alps in winter, a beer festival in Munich will have little impact on your final decision.
The key point is that the impact of local events depends on your travel goals, and is not a permanent component.
So, remember that relevance must be evaluated case by case.