I still don't see how your suggestions amount to anything other than telling people to spend a lot more money on completely different hardware and use it in a completely different manner.

FT-8 doesn't seem usefully relevant here. The fact that the bandwidth is so low that it can be sampled with a sound card isn't at all helpful when Meshtastic doesn't require a PC. And FT-8 carries minimal payload (typically amounting to no more than the automated status updates you dislike Meshtastic wasting airtime on), and I've never heard of anyone doing routing over FT-8. You're just making noise about a completely unrelated niche radio hobby.

If the constraints of LoRa and Meshtastic don't make it possible to implement the kind of radio system you want to play with, that doesn't prove that Meshtastic has made any wrong decisions. It just says you would get a more fulfilling experience from getting into a different radio hobby, and stop getting in the way of potentially productive discussions about how Meshtastic could be improved within the constraints of the currently-existing commodity hardware.