Listen, the mechanism is as follows: the impact of local events on choosing a destination is often overestimated, it is not always the decisive factor.
An event can be a plus, but it does not replace thorough research on fundamental elements like the overall budget or the seasonality.
For example, wanting to attend the Love Parade in Berlin is one thing, but if your accommodation is three times more expensive and transportation is saturated, your experience will be affected.
The key point is to ensure that the destination itself meets your basic expectations before considering events as additions.
Otherwise, you risk ending up in a fantastic city for a festival, but unaffordable or impractical for everything else.