Why do people care who Satoshi Nakamoto is/was? It's like wondering the name of the person that created the wheel. Sure, I suppose I would be curious about the name of the inventor of the wheel, if nothing else to raise a beer to them from time to time, but ultimately the wheel is the important part of the story.
You already said it 'curiosity' making people want to know the genius mind behind the great technology right in front of them, btc is not just your average invention (appreciate other inventions as well) it is way beyond that, many people have come to realise the uniqueness of it and are giving their support on a daily basis,
It is very natural for people to want to know, I wouldn't mind to know too, I mean it is the same thing most investors would do before supporting any project right?.
But in this case, btc has gain such huge amount of trust that nearly everyone don't bother about the person/people behind the masterpiece.