Those countries whos not in unions or alliances will take the burdens of those countries even with unfair trading rates even If their own countries economics and finances have done right ways by their leaders.
So what ever decision the usa or eu make...they have a lot options to play with everything that even of their own mistakes they can distribute their problems like inflation with those countries wich not their alliances.
Also...the economical and geopolitical power games between the countries and nations will lead to competation and war.
But smart way to fight and have competation If you fight with weaker and smaller then you that's why the big ones in this world never goes to head to head fight or competation really.
If USA need to fight and need some enemy then USA will choose that kind of enemy that for sure easy to win in war or any other competation.
Not just USA but maybe even france...or germany uk If they need to fight then always with weaker never stronger and never equal.
And countries like usa uk france can choose with who they fight they pick the one and they fight it's not questions asked If you want to fight If USA point finger on you then you are choosen one and you are in fight if it's war or econmical or political fight doesn't matter If you are much weaker you are good for competing....and usa will enjoy fight with you while you are a lot weaker.
That's why it's important to belong in union (the gang) so you get atleast some protection otherwise the powerful countries will do with you what they want.
Smart countries learn from history...that you can't fight with or compete with equal power as you are.
It's all about reducing trade barriers and accepting that certain countries will have natural advantages over others. Anything adding friction to trade, like customs checks or tariffs, will ultimately end up costing the consumer more - so if you are able to create a trading bloc that eliminates most of them, it makes it much easy to move goods around. Globalization is often frowned upon, but it has allowed countries to specialize and others to benefit from lower prices of goods, so we should all be happy in reality - as long as those goods are produced reasonably ethically and a country does not try to abuse the situation by gaining economic advantages, like through subsidies to dominate certain markets.