It was concocted to serve as an unattainable goal so that people would be clamouring or running their whole lives towards the imaginary destination.
The feeling being mistaken for happiness would most probably be liberation. If you can't be happy, you might as well be free.
Freedom is as good as it gets.
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion." - Albert Camus