Wessex Boy,
That's always been my way of doing it. After all, what are you doing now at the airfield? Flying. And what will you do when you get your PPL? Fly. what's the big difference? And people fly much better if they don't put themself under that kind of pressure too.
But you can tell this till you're blue in the face to the high achievers who see everything as an aim with a goal, or a challenge to be completed, and it's not an attitude they can manage to have; it tends to be completely alien to their way of thinking.