Why we don't receive Alien transmissions.
Basic Thermodynamics resulting in Shannon-Nyquist law.
Radio, other than star emissions, can't possibly be practical for a more than a few light years distance, tens at most if beamed.
Our emissions at the peak (lower now) hardly likely to be detectable much beyond Kuiper Belt and unlikely as far as the Oort cloud.
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There is no Fermi paradox, only a lack of understanding of practical RF engineering. The only likely method of detecting a civilisation is using the power of a star as "transmitter", the spectrum seen as a planet with an atmosphere transits in the same plane as our observations. The James Web 'scope should improve our ability to do this.
Biting the hand that feeds IT
