He was also that girl's tutor, which would have made it an abuse of power even if she was older.

No, I agree that this was clearly child abuse. The real stinker in this article is using real abuse to legitimize the swipe at James Webb on the end. The real culture war payload.

(James Webb was falsely accused of doing anti-gay purges based on a misattributed quote, but from this article you'd think he was a pedophile too).