Yes, protectionism never works. Except...
Except that no nation has ever successfully industrialized except behind substantial tariff barriers. England, the United States, France, Germany, Japan, South Korea all maintained significant tariffs during the period of their industrialization; they shifted to "free trade" (always more practiced than preached--note the massive subsidies that continue to sustain agriculture in almost all these nations) only once they had become dominant industrial powers--and "free trade" was a way to bludgeon trading partners into opening their markets. In recent decades, China's massive industrialization has occurred behind enormous barriers to market access, though often in forms a little more subtle than tariffs (currency manipulation, discriminatory rule-making, demands for "technology exchange").
Economists insist that protectionism never works. History tells a different story.
+1000000 but you will never get the brainwashed masses to understand.