The one and only philosophy class I've taken was an Ethics course. My instructor was excellent at helping us engage with the core of hypotheticals. While it annoyed me at the time, I appreciate the girl who bit the bullet for moral relativism; she was my first exposure to committing fully to an ethical system.

I suppose I agree with you, that philosophy isn't useless, but the Sequences and the dialogues with other rationalists have been pretty effective, too.