They are extremely paranoid of anyone "sneaking" in, especially from countries that could be considered "poorer". I agree, the process of a visitor's visa is insane. You are probably much better off if she just came as a tourist...
Also, when you are inviting someone into "Schengen"/EU, you are taking quite a huge responsibility because any and all costs for the state or hospital bills can ultimately be billed to you. So trying to see the upside of things, you could say they are just making sure all bases are covered.
On the upside, you won't get shot at the border - I'm looking at you, USA/Mexican border.
Also, when you are inviting someone into "Schengen"/EU, you are taking quite a huge responsibility because any and all costs for the state or hospital bills can ultimately be billed to you. So trying to see the upside of things, you could say they are just making sure all bases are covered.
On the upside, you won't get shot at the border - I'm looking at you, USA/Mexican border.