Taking responsibility

At Reason, Julian Sanchez concludes that

Classical liberals have become good at explaining how the market order they favor promotes freedom and happiness. They have been less adept at explaining why—at least past a certain point—people ought to want that freedom, which when genuine is always at least a little frightening. In the face of the parentalist impulse, we may need to develop the case that our bad choices, the choices that make us unhappy, are as vital and precious as the ones that bring us joy.

I think that if you have to explain this, then you've lost at least half the battle. What's at issue is more attitude than opinion. The first "argument" that popped into my head to support the above quote was "Be a man." I'm not sure a more rational argument would be any more persuasive.