How is it safe to spend all this money on a domestic factory just for it to be cheaper to import everything anyways? The safe choice is to hoard cash and invent

How is it safe to spend all this money on a domestic factory just for it to be cheaper to import everything anyways? The safe choice is to hoard cash and inventory until they have certainty of whether tariffs will happen or not. All Trump is doing is creating unnecessary deadweight loss when he can just negotiate without threatening a suicide pact.