I'm baffled but not surprised to read so many convolutions for the purpose of an exam. Any course for a private pilots licence is for one purpose: to operate safely meaning with the risk of harm to oneself and to others kept at the minimum. So the course contains a mixture of necessary handling skills and necessary knowledge. This is then followed by both a practical and a knowledge assessment to ensure this is achieved. The PPL is not a 'unit' offering 'credits' for anything else. The licence stands on its own merit. The content should not include anything not relevant nor be done in such a way that is not part of the immediate aim.