There are electromagnetic waves reaching the earth from this galaxy which were emitted anywhere from 80,000 years ago to an instant ago, and everywhen in between. Practically all alien races among the hundreds of billions of solar systems would have to have been electromagnetically silent for a minimum of 80 thousand years for us not to see them.
If you include other galaxies, then they would've had to have been silent since the beginning of time.
Also, non-living matter spontaneously forms into living matter by no known mechanism.
If you're going to believe something religiously, make it something less trivial than muh aliens.
No, I imagine them doing exactly the same thing we are: using more and more efficient methods of communication as we develop them. Compressing and encoding data, focusing our transmissions where they need to be instead of blasting at max power in all directions, using the most effective form of transmission for the purpose whether it’s laser, microwaves, specific wavelengths of radio, or hard line connections for planet side comms. Signals decay very rapidly over distance so unless you have a very good reason to build a gigantic transmitter capable of reaching beyond a few light years in all directions you’re not going to just accidentally wind up communicating with a random star 100ly away.