Literally in the comment I responded to, you expect student tutor to make the subject interesting. This is your description of what you expect: To fiendishly ask questions that are just out of reach of the students ability, or will reveal some tiny flaw in the students understanding. This type of thing engages everyone when done well.

Plus, this is your attitude toward kid tutoring another kid: as a tutor, you have exactly two jobs: Make the student interested. Improve the student's skills. And you have this expectation placed on a kid.

> I merely said that something, anything at all, is better than nothing.

That something is to put responsibility on a kid and then blame a kid for not tutoring well enough it it fails. And I am telling you that it is unfair to punish the good kid by doing this. Because this plan is not caring about the "good" kid at at all.