Then they're not great engineers. That's fine at the beginning, but in a long run, they need to care or they'll cause issues. The separation you mentioned and the possibility of creating higher order tools exists only if software can support that kind of environment.

Whether the software can be set up with a single file / endpoint / environment, or does it require interaction with a custom gui for initial setup for example defines whether ci/cd setup is trivial or a long project on its own. Unless devs can work to make things easy to automate, high order tools will not help them.