🇳🇱
Well yes and no.. It certainly would make it harder to pick out a single signal, particularly if its some wifi router on a persons desk, and see its bit-for bit transmission. But two important facts related to that..
1) if we are talking about intentional communication where each person aims a dish at the other and beams out at a reasonable but high power, than those distances are entierly workable in terms of getting a usable signal out
2) we dont need to detect individual signals to be able to determine intelligent signals are talking. If there is a whole region of space where some portion of the planets are all transmitting unintentional EM similar to earth, then while we wouldnt be able to decipher any one signal we **would** still be able to detect that signals from intelligent life is being produced.
The universe doesnt just have a flat floor. It has very specific characteristics that are the aggregate of all the frequencies we expect to hear in the universe in terms of EM. signals from intelligent life would look like a bump in the power spectrum of the expected noise that couldn't be explained by aggregate natural source.
