... so what, so no one else should be allowed to want it?

What the point of docker if you can't just run single binary everywhere? That was its promise, right?

No it wasn't, you are thinking of Java.

Docker was snapshots of developer machines you can run in production. They never promised that it would run everywhere.

The point of docker is to bundle all the dependencies of a given application into a single place.

That way you don't have "works on my machine" problems, because both prod and dev are clean virtualized identical systems (containers)

I don't think that doing so across architectures is a major goal.

You're confusing docker with java.