I think what you're saying is that the problem which was once easily diagnosable from an incorrect import may now become much more difficult to diagnose from an

I think what you're saying is that the problem which was once easily diagnosable from an incorrect import may now become much more difficult to diagnose from an incorrect interface implementation. I think that is somewhat valid in a technical sense but a lot less likely to occur in practice, because most people will use the package-level functions which are guaranteed to use the CSPRNG.