I'm sorry, but it cannot be that no one ever succeeded because things were hard. Inflation in the 1970's was incredibly high. I still remember poor people hanging on and workin their way up, and without high paying factory jobs.
And it cannot be as convenient as Mr. Trump's China as the bogeyman. Think harder.
Before all manufacturing went to China, it went to Mexico for the automotive companies. It went to Puerto Rico for the big pharma. It went to Japan for electronics. It went to the "baby tigers" in the 80's for the same reasons it later went to China. It was capitalism becoming globalized. Labor did and does see the cheapest route. Once labor and shipping combined are low enough, it flows to SE Asia, to the Phillipines, to the Indian subcontinent, to Central and South America.
Even domestically, service jobs flowed out from cities on the West Coast to the Midwest where jobs were fewer and labor was hungrier, especially unskilled labor. Then it went overseas.
And, as I've said repeatedly, we have the best government money can buy. Industry writes the laws and Congress passes them. Big companies simply incorporate overseas to avoid the laws and taxes they truly owe. Or they move just over the border, to Canada, as Burger King did when it bought a company just to use the street address.
It is not the scheme of any one administration, but of a government that long ago sold its power to the highest bidder, be it JP Morgan, Mr. Vanderbilt, or George Bezos.
That still cannot all be lumped into "it's hard, so why try?" And it certainly isn't "it's impossible." Is it harder than it was 70 years ago? Likely, but the determined will find a way.