Living in The Netherlands means I can check out with iDeal (will become Wero) and often even without an account.
With Amazon I have to check I am on the right store to get actually normal priced shipping (3-5 euro instead of 20-30 euro). If they have something on Amazon.com I can only pay with a creditcard instead of all the normal options other versions of Amazon offer. The only thing Amazon does correct and most other North American stores don’t is add the tax to the price which they are supposed to do.
Not everything is about the US though
Plus, if they sell to people in the EU they need to charge VAT anyway on the shipping. Some exception apply, but you as a person will not run into them.