rocketman5150, have you gotten a chance to teach much, particularly clients with big ambitions for after they complete training? Your opinion might change if you worked with this type of client for a while. Flight instructing is not always about prepping for a check ride and hammering through a rating. It oftentimes involves mentoring.
I'm typing from my iPhone so can't write much right now, but I just wanted to say I've done this sort of thing a lot, and it's almost universally appreciated. By having a clear picture of where the client is going, the instructor can tweak training to be as applicable as possible.
Sometimes I wonder if these arguments are more about semantics than anything else. I agree, I wouldn't "sit a client down" necessarily, as that could come across as demeaning, but I might "insist we set aside time to discuss plans for the future." Does that sound better?