It seems like humans need to make themselves feel special, that they are not satisfied with just existing. No, there must be a reason and it can not be boring!
Why would a culture so advanced that they could span 100s of light years (minimum) bother with our race? As our own history has shown us we all tended to build in the same way, though some did better than others. Caves, huts, pyramids, every culture seems to have them. One could of course say its guidance of an alien civilization, but others would say there is a general scientific tree of knowledge that civilizations follow. That ideas eventually branch off of each other into other ideas.
Example: You can not invent the car before someone invents the wheel.
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I do not completely agree with Stephen Hawkings idea that advanced cultured conquer more primitive ones. This could simply be part of being human, another race may be far more nurturing.
Still, I would probably be a bit terrified if they did come. Humans fear what they don't understand, kill and squabble over each other because of it. Even if we meet "kind" aliens we may piss them off just from our personalities alone.