The problem is (my guess) Logistics is hard.

Amazon might make it look easy but it really isn't (and Amazon is not available in all EU countries either!).

Logistics is more then just shipping, but also returns, repairs, availability, shipping time, shipping costs, where and how to keep stock. And this points affect each other, i.e. they might not have enough supply to sell to the whole EU market etc.

Lastly while there is a free marked in the EU if I remember correctly there are still some differences when importing things from outside into the EU depending on the country of entry. Like how to fill forms and which companies you can work with (for what prices) in given country.