There are more shoe and t-shirt manufacturers than there are heavy equipment manufacturers. They would, in theory, employ more people.
That's pretty lame. There aren't more shoe makers and t-shirt makers in the US. And I don't want to import Mexican laborers so that we can open more of that kind of business here. I'm perfectly fine with Mexico and China making shoes and t-shirts. We'll make the construction equipment, farm equipment, airplanes, and other stuff that they can't make.
Not to mention, the targeted audience, most everyone on the planet wears clothes, does everyone own a bulldozer or a 747? Blackbird.