STEEL has strategic importance.

Mining, agriculture and manufacturing have strategic importance.

If you let these industries die, reviving them will be very difficult and consume time, money.

If America doesn't preserve its steel industry and manufacturing, if America will simply consume what is produced elsewhere, then it will be dependent on others (on China, particularly).

Then America will not be able to confront them if they commit fraud and abuse.

America them will not have truly independent foreign policy.

When (((they))) make America dependent it would be an important milestone towards globalism.

American STEEL = Independence

Foreign STEEL = Dependence

Dependent America = America under globalist control

Imagine China being the sole provider of STEEL to the US. That would mean they have America by the balls. They could sanction America and send the US economy into abyss.

That's why steel as well as other commodities and industries are so important.