As best I could tell from what she wrote, the key to it is that she had developed a framework of belief and morality, and by learning that, you could make benevolent and useful decisions. Libertarians, regardless of whether they wanted many of the same things or not, basically did it out of self-desire, with no morality or logic behind it.
Ayn Rand was closer to Jesus or Confucius than to say Paul Krugman or Ron Paul. Personally, I think that anyone who expects people to somehow become better and more moral beings - regardless of what moral system it is you preach - is deluded. People are going to act like people, regardless of what book you put before them. But I’ll grant that Objectivism isn’t Libertarianism.