Bears most likely out-ruthless you, but, uh, I don't sed them building Dyson spheres anytime soon.

Aliens probably aren't this edgy, nihilist caricature. Most likely, they're kind of like us- Curious about us, hoping for the best, but irrationally fearing we're an "highly aggressive apex" or whatever self-absorbed nightmare the less enlightened individuals of their species dreamed.

Seriously, you think anyone is gonna cross 50 light-years to kill a bunch of featherless bipeds and plunder some common rocks?