Why is that "ignorant"? And what do you mean by "free"? Do we have a "free" military or "free" public schools?
There's always an argument to be made for any x whether it should be a right or a privilege. If school until 18 is a right, why not school until 22?
Our opinions differ but neither side in that difference is "ignorant."
I don't see how we can afford it when we have 20 trillion in debt and are running a 500 billion dollar deficit each year. There needs to be a reckoning as far as what we can afford and how it will be funded. The status quo isn't going to go on forever.