My point is that some subjects, like modern economics, are best taught in academic situations because of how complex they are. There is simply too much higher level math in neoclassical economics to learn on your own unless you are a math wiz.
Why are you presuming liberals are dumb? Liberal societies are functioning in the real world while the most successful attempts at socialism are those that moved towards hybrid economies (Vietnam and China).
Arguing from a conclusion means you have decided what is correct and then seek proof to demonstrate that which is the opposite of how scientific reasoning works. You should probably be familiar with that term if you are not.