Well it's because few people have "European-ness" as a strong personal value. Some people have strong values around open-source, or even around the specific country, but the sense of being European and valuing European things is just not very widespread, so in absence of a specific personal value, they pick the cheapest/biggest/most-known option which is usually American.

This is quickly changing though: my subjective take is that the US antagonism is pushing people away from American product AND making the European identity stronger.