UFO crashes

I got a question about these UFO’s that crash into our planet. How does such an advanced civilization that can travel across the universe just happen to crash here? You don’t see them littered across the moon land scape either. But does anyone have an idea on why this would happen? I have a few ideas but they all get washed out by the fact the are so advanced. That if you can travel that far without hitting an astroid or comet to only crash on earth has to be somewhat embarrassing for them.

Here are a couple more questions. Are aliens using our planet to get stuff they need? If so what do you think they need from us? Is the reason we have not been told by the government about aliens is that they are not nice and would harm us?

Thank you. Have a wonderful day everyone.