Why is there a region lock on the servers??

Why can't i see servers outside Europe? When my friends play, i can see the US servers in the Friends tab of the Server Browser, but i can't see them in the regular browser! Why am i being blocked outside the game?

I'm from the Netherlands and mostly play late in the evening or even night, in the night, i can find maybe one server with just over 40 people playing if im lucky! Don't block me out of the game!!

Why is there a region lock on the servers??