At the relevant distances, it could be that sending a message that would arrive as anything that stands out above the background noise of the universe would probably require a mono-directional transmission directed at a specific target, which would require a lot of specific effort that a smart enough species may see as not worth the resources. Frankly, we're smart enough to know there is alien life out there somewhere without needing to see it for ourselves, and until our planet is much healthier and our species less chaotic, what would be the point of trying to contact it?

What if it's like us but worse?

And as others have mentioned, a smarter species would likely try to hide, maybe even trying to capture as much ambient RF leaving their planet as they can so we don't find them by accident.