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!
Ok, the Docker client stuff is not always exciting but once you want to deploy something small, say, an app server, a DB and something like nginx or Traefik you need some orchestrator, eg k8s and then you need again images. If you prefer containerd over Docker also good.
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.
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).