Not today it isn't. Years, maybe decades ago it could be.
What Linux containers do is help to remove the barrier that various distributions introduced, it makes things more accessible and it's more lightweight than using virtualization. Centos, Alpine, Ubuntu, whatever. As long as it is in a container I can work with it. I can even run some Windows binaries with Wine inside a container. rkt is largely compatible with Docker infrastructure, so that too is fine.
But what jimktrains2 suggesting is complete opposite of that, it reduces options.
