I wonder if eventually the SNR of electronic content will simply be so low that any communication of nontrivial value will simply take place over physical chann

I wonder if eventually the SNR of electronic content will simply be so low that any communication of nontrivial value will simply take place over physical channels (e.g. face-to-face and trust networks), as it has for all of human history but the modern era. Or we truly embrace cryptography as a people and use it to build such networks of trust in the digital realm (e.g. news videos cryptographically signed by reporters and news organizations). Speaking of which, the notion that one can possess irrefutable audio-visual evidence of an event is also a very recent one. Until the 19th century absolutely any news item traveled word-of-mouth (or ink) through trust networks and were absolutely subject to manipulation.