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.

Same in Europe when buying from North America stores. Listed price is 100 USD so I assume it will be 100 EUR, by the time I received the item I have paid close to 160 EUR and often you need to spend going through filling in your information before it gives you that total price and sometimes they unfairly compete with their prices before tax with other stores with prices after tax. Which is illegal, but hey/

In most places the tax is included in the price and often mandatory because nearly every country in the world can figure out a way to do exactly that.

A lot of webshops in The Netherlands refund the full purchase price including shipping and the bigger once also pay for the return shipment.