"Surely it doesn't make sense to counter a minority opinion that more freedom is needed, with the argument that it is a minority opinion and therefore the freedom in question is not needed."

If libertarian economic organization is inefficient at providing certain types of needed goods (the military, roads, certain types of charitable giving), while democratic processes lead to more efficient results, then the libertarian strategy takes money from people, involuntarily. And taking money from people is wrong.

People therefore voluntarily choose democratic processes to settle certain of their differences because they believe it maximizes their economic choices and therefore their freedom.

Therefore, it should not be surprising that the majority of free people support democracy, and not exclusively libertarian policies. Given the effectiveness of democratic political processes, it should not even be surprising that the wealthiest are prepared to finance this productive enterprise, with their taxes.