The idea isn’t that transport magically disappears. The idea is that users don’t have to deploy, operate, pay for, or even think about transport.
GitHub happens to provide one out of the box, which makes the proof of concept extremely easy to try.
If I need to run databases, message brokers, servers and monitoring just to send my mom “please cook macaroni”, I’ve already lost interest.
It's sharing this advantage with every other free, third party managed communication service I can choose to depend on. It's also sharing the weakness that it puts me at the mercy of whatever third party I am relying on. It introduces a new weakness in that the third party being relied on here never intended for their infrastructure to be used in this way.
> If I need to run databases, message brokers, servers and monitoring just to send my mom “please cook macaroni”, I’ve already lost interest.
So don't. To that end, what specific problem does this address that other free third party communication service providers don't? My mother will have seen my email or SMS before you have instructed your mother on how to join GitHub and get an API token. We don't even need to agree on or stick to a provider.
Macaroni doesn't fix speed. It fixes who holds the keys — and who gets sued. That's the point.