That's exactly the point of Eurovision. Eurovision is harmless entertainment where people can participate and play the game any way they want. You can make political or cultural points by voting, or create fads and feuds, show solidarity etc.

A Finnish horror rock band wearing masks won because people found it funny to rebel against typical second rate pop from second rate stars.

Bearded man in drag won because people realized that they could trigger homophobes.

Ukraine won 2004, the same year as there was the Orange revolution in Ukraine.

Ukraine won again 2016. Maybe it had something to do with the War in Donbass.

Or maybe these were the best songs

There's a morbid joke that "International Figure Skating is a team sport, played by judges."

Perhaps it isn't popular in spite of the collusion, but because of it.

And even more so when a country manages to break that collusion and win despite the odds that are against them