The auto industry vigorously opposed the steel tarriffs, and suffered from them, and laid off workers because of them. The fact that people kept buying cars is beside the point.
And technological advancements in most fields are still coming from America, even if code-writing is being sent overseas.
Much of America's wealth today comes from overseas investment by Americans. It comes back here, and it is used in turn to promote construction, and efficiency in the domestic manufacturing and mining and agriculture sectors, and to improve general quality of life in other fields such as health care and all the other lines of work you mention. We still do have a manufacturing base, because for some things we need it here. And we have enough of one to fight a major war if necessary.
As an aside, you must be happy about the recird high oil prices, because they are helping domestic drillers a lot. I don't think, though, that it means the nation is better off.
once you lose an industry - you no longer make advancements in it. Advancements come from places where engineers work, and investments are made. This mythical idea that we can lose these tech industries, but that somehow "advancements" are simply going to spring forth here anyway because we are "the Americans" is chest thumping nonsense. who is going to make these future tech advancements, all the kids who are now piling into law school?