Why would any self respecting alien(given that they have the technology to do so and given that, have so much more than we do) come to this obscure planet in this obscure solar system in this obscure galaxy when there are innumerable others to choose from? If they have everything we have and more, what would attract them? Just askin.
Earth is a zoo with that holds an extremely dangerous and hateful species. A quick look is entertaining. It would be like dropping in on one of those reptile farms on the way to Walt Disney World. (The latter causing cold chills.)
There's always a beginning to everything (except God, of course) and if we ask the right questions we CAN get to the point of why one got out of bed in the first place.
If only he'd'a hit the snooze button.