Even though I disagree with your implied claim that trust is eroding, you don't need trust for it to work. Economic principals cause it to naturally work. As you move along a price curve reducing the price you typically will make more sales.

No, for some products trust is more important than price. If the price is low but you can't trust it to work when you need it most then the price is irrelevant.

>then the price is irrelevant

Not everyone is irrelevant to the American market. The negotiations around American tariffs are not relevant if you are not selling to America in the first place.

There are more perspectives to this than just the USA one.