I find that almost unbelievable - to train someone to PPL level without showing them the greatest single way to broaden their horizons and go to interesting far away places.
What a bizarre comment.
The greatest single thing that stops people broadening their horizons and going to interesting far away places is the weather, not anything to do with navigation. So the greatest single thing to overcome this would be a magic wand. (Or possibly an IMCR or IR, but many of us here fly for fun and sitting in cloud wouldn't count as fun.)