Yeah, the concept of "productive struggle" is important to the education process and having a way to short circuit it seems like it leads to worse learning outcomes.
Interesting article, but I think it downplays the incidence of students using Claude as an alternative to building foundational skills. I could easily see conversations that they outline as "Collaborative" primarily being a user walking Claude through multi-part problems or asking it to produce justifications for answers that students add to assignments.