I think the point is that the situation is probably worse than what Anthropic is presenting here. So if the conclusions are just damaging, the reality must be truly damning.
To have the reputation as an AI company that really cares about education and the responsible integration of AI into education is a pretty valuable goal. They are now ahead of OpenAI in this respect.
The problem is that there's a conflict of interest here. The extreme case proves it--leaving aside the feasibility of it, what if the only solution is a total ban on AI usage in education? Anthropic could never sanction that.