That is true to the extent that Objectivism is an atheistic philosophy. In Objectivism the "Blessings of Liberty" are derived from the nature of human existence using a rational process.
Irrespective of the hows and whys of individual liberty and freedom, Objectivists believe in the sovereignty of the individual as the basis of the Objectivist ethics.
But I do think this is where it unravels and I don’t think it is just a matter of taste. Making the claim that there is no higher aspiration, no higher authority than the Individual really is claiming the status of god. Which is fine, I suppose, if there isn’t one but it invites His wrath if there is. Since I, obviously, believe there IS it seems to me Objectivism can only get you so far and then you run into an intellectual swamp which, IMHO, is what has happened to Objectivism.