You are absolutely correct. It's a major shift from the norm. Look at Canada, they have been protecting products while being some what progressive over the last 100 years. Their social policies dont align with their capitalistic ones, but they worked in their favor for years.
Canada does not protect products anywhere near to the same extent as the US does. Virtually no imports from any country have any Duties or Tariffs into Canada. I import a lot of items, sometimes more than five figures worth in a year, and I have never paid a Duty or Tariff. I have paid an Environmental Fee ($10) on tires made in Japan. That's it.
For example in Diary, a certain amount of product enters duty free, and once that limit is reached, tariffs are applied. The US does exactly the same thing with Dairy, by the way. As it is now, 75% of the cheese purchased by Canadian consumers is US origin. There is little milk imported simply because milk is perishable so transport is inadviseable as the product isn't useful from distant plants. But it is not prohibited, you could import it if you wanted.
Canada does not restrict imports of sugar in any way, the US essentially prohibits sugar imports via a very high tariff (that is why cane sugar soft drinks are so rare in America). There are many other examples.
But that isn't the point. This topic is about electronics, which by now (Monday 7:43PM CST) we should know if the US will add $200B worth of tariffs on PRC imports which will include complete manufactured electronics (not just parts used to make them). I haven't checked to see whether that has been triggered, Monday Night Football is on ;-)