For me it is the concept of registering to vote. I am citizen so I have the right to vote automatically and only thing I need to provide is some accepted ID.
Europe and the EU are a very small part of the world as a whole, 60% of the world lives in Asia, with the biggest countries in the world having two or zero choices.
There can be plenty of political parties (a la the UK), it doesn’t mean there is the possibility of electing them all.