the school doesn't teach you to fly with the machine fully loaded with noisy pax.
Neither does flying 10 hours solo! In fact it is likely to develop a level of overconfidence and then when the aircraft is fully laden and not performing as well, it is potentially more dangerous rather than more safe.
Perhaps we should examine where this half baked rule came from, put simply it was the result of a reaction to lowering the hours required for a LAPL and the fact that most cannot acheive it. So we keep the reduced training requirement and then hope that a magical 10 hours of unsupervised flying over an undefined time period with no further check will resolve the issue. The work of a halfwit! Perhalps the same halfwit expects an Examiner (who for a LAPL needs half the experience) to require half the standard after half the training!