basically, it seems LW is a huge phobe, while trying to pretend not to be

Yup.

The "why not heterosexuality" thing is basically "all lives matter", and there is no actual non-*phobic reason why knowing about lesbians (and gays and bisexuals) is inappropriate, at any age. You don't need to read Chuck Tingle at them! You can phrase it in really basic PG terms! *flail*

(not flailing at you, ofc.)