That's not a given at all. It might be literally impossible, no matter how powerful you are.
Yep, that's true. This is why the Fermi Paradox is a thing. The galaxy should be absolutely full of life, and yet we've seen exactly zero indication that there's any out there. We've got a lot of fancy techniques to figure out stuff through telescopes, so by if anything was near us (in galactic terms) we would expect to have seen some signs by now. Certainly we think we'd be able to detect a Dyson Sphere, for example. And yet there's nothing. It's a bit worrying, really.