For example, I have a pretty solid attitude against genetically enhanced food and where I live, there are quite some people who think likewise (central Europe). But through HN I learned, that there are other places in the world, where such food can significantly improve the lives of many humans and where educated people can't understand how on earth you can possibly be against using such technology.
I find such insights very valuable because it shows me how limited and filtered ones real-live perception can be.
It serves as a non-tariff trade barrier against the USA. Promoting this attitude serves the European agricultural producers, particularly the seed suppliers. European consumers of course pay higher prices.