The CRUD example is just bad for no reason. It looks like a typical master-detail view, but the detail view doesn’t give any feedback when the selection in the list changes.
eta: Bad UX granted, I gather that the task is meant to compare DX. (And it'd be useful for comparing coding approaches by individuals, for evaluating interview candidates. For that purpose, it'd perhaps be useful to be able to test a person's particular design choices, and how they interpret the spec, perhaps to see if they are justified in building something not-quite-to-spec.)
eta2: https://eugenkiss.github.io/7guis/tasks#circle
Man, look how detailed this is. I suppose some people's job as developers is to literally implement specs exactly. Glad that's not my job. But maybe some folks would prefer not to have to deal with ambiguity.