>But I (an American) pay for some European services in Euros, meaning those got 10% more expensive.

European services would be the least of issues. The main issue would be the tons of foreign imported food, cars, products, clothes, gadgets, and so on - including tons of component parts for "american" products (not to mention materials and tooling to make even the increasingly rarer "100% made in US" products).

But that’s because you decided to take on currency risk without hedging or having a matched foreign income stream.

That’s not what anybody with scale will have done.

And now you have to reevaluate the cost of that service relative to the alternatives - including letting them know they need to take fewer Euros to retain your custom vs the competitive alternatives.

Customers are hard to come by. Are they prepared to let you go?

You're just shifting the goalposts here.

I will still stick with them because they're better value than the American alternatives, but that's beside the point.

You were arguing that the same number of dollars will get me the same number of goods and services, which is not true.