Free Market Flaw: No Intellectual Property

I do not understand why so many people support free market economics. It is as if they read a bit about it, understood some of it, and are in favor of it because they read a bit about it and understood some of it.

A wise person is able to consider a view that opposes his own without prejudicially denying it nor necessarily accepting it. A realistic person must accept that nothing is perfect. Those who argue in favor of free market economics, at times, seem to be neither wise nor realistic. They simply argue that opposing views are necessarily incorrect, and that the free market system is perfect.