[827a]

Docker images are self-running. Infrastructure systems do not have to be told how to run a Docker image; they can just run them. Scripts, on the other hand, are not; at the most simple level because you'd have to inform your infrastructure system what the name of the script is, but more comprehensively and typically because there's often dependencies the run script implies of its environment, but does not (and, frankly, cannot) express. Docker solves this.

> Docker just wraps what you'd do in a VM.

Docker is not a VM.

> Plus all the downsides of docker.

Of which you've managed to elucidate zero, so thanks for that.