clodhopper
Get off my lawn, punk!
How much effort would it take to get to our planet; wouldn't there be some giant mothership that would transport the surface exploring craft? If they did have an orbiting mothership; wouldn't they want to rescue crashed vehicles to keep the technology advantage to themselves? If they had the technology to get here wouldn't they want resources/food in return for all the effort?
If the alien tech is so advanced that they can get here on a smaller surface craft why would it crash? Why would they leave it behind? What would such an advanced society have to gain from us? Do we really think we are so special that aliens would have any value in our primitive knowledge? If aliens have made it here, wouldn't they consider our society and species no different than how we feel about ants or cattle or enslaved animals?
Your line of questions show an assumption that a highly advanced race would do things like in a manner similar to how we operate at our level of technology. An alien race that can travel across incredible distances in reasonable timeframes are more than likely no limited to our understanding of physics. They may not need "surface craft" and the main vehicle can reach the surface. Or they can "beam me down scotty". Or more likely something else that is beyond our understanding, like flipping through dimensions, here one second and gone the next. Someone else said it likely be similar to explaining a helicopter to a cat. Very likely. In that case, our existence may be ignored, much like we would a planet inhabited by monkeys.