I am allergic to glitz.
The idea that local events are a decisive factor in validating a destination is an oversimplification; their importance is often secondary and heavily depends on the true purpose of the traveler.
What matters is what motivates the trip and what changes tomorrow for that person, not a glossy event.
For someone looking for a job in Amsterdam, for example, the availability of positions and the quality of life are paramount, long before a festival like the "Grachtenfestival".
Events can influence ticket prices but do not dictate a career or a move.