Every dollar which will now have to be spent for steel and the things that are made of steel is a dollar that will not be spent for other goods and services.
Other goods and services whose providers employ people.
People who, as a result, will have less work.
Some of these posters need to find and read Frederic Bastiat, Adam Smith, Ludwig Von Mises, Friedrich Von Hayek, Murray Rothbard, Henry Hazlitt, Milton Friedman, Thomas Sowell and Walter Williams.