> You can regenerate your base images every day or more often and have consistent containers created from an image.

That solves nothing, as it just moves the unreproducibility to a base image at the cost of extra complexity. Arguably that can even make the problem worse as you just add a delta between updates where there is none if you just run apt get upgrade.

> Freshly generated image can be tested in a pipeline to avoid issues and you won't hit issues like inability to scale due to misbehaving new containers.

You already get that from container images you build after running apt get upgrade.