Well.. Way more than 5% of consumption happens in the US. The majority of those 95% is also very poor and can’t afford a lot of of goods (let alone expensive ones).

Meaning that for a lot of businesses, especially those that manufacture goods US is often a very important and hard to replace market.

e.g. What do you think will happen to the profit margins of EU drug companies if Trump actually imposed his tariffs on pharmaceuticals? Besides the size of the US market they also generally charge much higher prices there.