I said the same to a conspiratorially minded friend today ... Like dude, if they're aliens who are capable of finding us and then _coming here_ they're not going to be getting shot down by the Air Force.
Just think of what kind of technological advancement it would take for _us_ to determine there was life on some planet, and then the subsequent advancement we'd need to actually send something there. And then, imagine actually bothering to do so, when you're at the level of technology that it would imply to have the ability.
Just think of what kind of technological advancement it would take for _us_ to determine there was life on some planet, and then the subsequent advancement we'd need to actually send something there. And then, imagine actually bothering to do so, when you're at the level of technology that it would imply to have the ability.
Why bother?