so many people believe in God but (almost?) no-one believes in centaurs.

That is only because the poor old centaurs had no-one to torture, maim and kill those who said they did not believe in them. Eventually the God myth will go the same way as the others but while people are not only willing to believe, but happy to kill off the opposition, we still have a long way to go.

I believe in us Gnomes.

:D tG