The request is followed by an explanation of what they'd talk about, how they'd record, and what to expect. I can attest from personal experience that while receiving an invitation to a podcast is flattering, I'm always still hesitant without knowing what the topic is or what they'd like to talk about. I then, as the receiver, have to ask what they had in mind. By telling Tyler what he'd like to talk about and what he's particularly curious about, that's one less thing Tyler has to think about and makes it that much easier to accept the invitation.