I think you already answered the question. You don't need to introduce docker cli, docker daemon, a container registry, etc. Not saying theres anything wrong with docker but having options for application packaging is nice!
Even if you still use Docker, a container wrapping a single binary is simpler than a container with dependencies and source files.
It’s also good for closed source use cases (blasphemy, I know).
What I am saying is which orchestration and deployment system does favor single executables atm and has a huge ecosystem? You still need to create images and do double the work. I like real binaries like Go creates but repackaging the run-time doesn't sound like a sophisticated idea but rather making the black box even bigger.
As a sibling said, for client side/3rd party apps, yeah this might be a nice-to-have but this space has rather other challenges.