Try asking them to make useful diagrams for some stuff in a codebase, out of the box without excessive hand holding they don't make good choices about what's worth communicating and how to do it.
You see this in their pointless frontend copy all the time too.
Yeah, makes sense. A parent wouldn't bother explaining the details of their job to a toddler.
I wonder if this is a side effect of MoE models — they can write excellent prose, but not simultaneously with writing code.