Domestic manufacturing decreasing as tariffs decrease implies that increasing tariffs would increase domestic manufacturing. With their argument being that you needed to do it 50 years ago when the shift started because if you do it now it's really painful.
That's a misnomer if ever there was one. The current batch of tariffs will destroy enough American wealth to nosedive the economy before any long-term change. Manufacturing is not coming back, there's just not gonna be enough wealth in the US to warrant it. Plus there are counter-tariffs, so if you make it in America, you can't reliably export it.
This isn't 1971 where Nixon could tell the world "suck it. our dollar, your problem" because America was the sole hegemon.
Today, there is a rival player. China. Its a completely different game.