I think you need to read what I wrote more carefully. I try to be precise with my language.
Simple exercise: The bill of materials for Arduino boards is publicly available. Pick a board. Now go source every single component on that board.
Create two spreadsheets. The first would have you source what you can from China. The second would source from any EU country and the US if you'd like and exclude any Chinese made component from the list.
My prediction: You can make 100% of an Arduino in China using Chinese components. You cannot make an Arduino in Europe or the US without Chinese components.
Let's add another layer to this.
Let's say you create a third spreadsheet where you source as many components (and services) as possible from the US and Europe and whatever you can't you get from China.
Now calculate the cost for each case: China only. US/EU only. US/EU + necessary Chinese components and services.
Prediction: The US/EU cost --if it is even possible to do it-- will easily double or triple the cost of that product. The US/EU + China cost won't be competitive at all because the vast majority of the items will have to come from China and you will incur additional costs for producing in the US/EU rather than just facing reality and having the product made entirely in China.
Please note that I am using an Arduino as a super-simple example for the sake of an illustration. It would be wrong to engage in dissecting this simple illustration tool in an attempt to invalidate my claim. This claim comes from decades in manufacturing, where I have faced this question of where I can buy components, assemblies and services. Twenty or thirty years ago sourcing from the US or Europe wasn't horribly difficult. Today, it is frustrating to see just how difficult this is. The problem is real.
Nobody is suggesting 100% repatriation of the supply chain. That is impossible. There is a number between 0% and 100% that would do both the US and Europe much good. I don't know what that number is.
Once you start looking at more "real world" products, the picture gets dark very quickly. Last year we designed a robotic system. Virtually every component that went into making this robot came from China. I think I can say that the aluminum, sheet metal and bearings did not. While I did not conduct a component-by-component survey, I think I can easily say that 95% of the electronic components, connectors, wires, cameras, displays, sensors, pneumatic valves, motors and even the wheels came from China. In other words, if you had to make this robot without China all you'd end-up with is an empty metal shell. That should make everyone take pause.