There's a whole possible scale of responses and of encouraged workflow though.

Wordpress and a lot of php community does actually like the "drop in some code and it usually works" approach. This encourages continuing on that path.

On the other side, the failure can be handled in many ways. "This module could not be loaded and will be ignored." is one. Ensuring some preparation / validation is needed before upload is another.

Let's not go to extremes like "you're expected to have a staging environment for your personal blog because the framework cannot possibly help you".