That's exactly what I was thinking. Freedom = responsibility for one's own life.
Having zero responsibilities means you are not free at all and needn't worry about achieving anything as someone else is sure to handle it for you.
Thus, as this post points out, a complete lack of freedom leads to an unfulfilling life of misery. :)
But the burden of freedom can also lead to a life of misery, if you don't have the right mindset. Some people just can't take that they are completely to blame for their choices and existence. It's a lot easier to blame someone else when you're not happy.
True, it is much easier to blame someone else for our own shortcomings, but the end result of doing that is ongoing discomfort and sadness. Doing it doesn't ever actually make anyone happy.