1)  No straight person wishes they were gay, but a lot of gay people with they were straight.

2)  it's very possible that a teenager's sexual identity hasn't been fully formed, and also very possible that an influence toward ss attraction may alter their sexual formation.

So no, homosexual teenagers should not be encouraged to "embrace" homosexuality.

If they determine they're homosexual in adult life, then fine.   They don't need adults to encourage them into a homosexual identity and acts -- and that's the purpose of this group.