Is Classical Dressage enough?

I was asked one time what the difference was between my approach and classical dressage training. I would say that the similarity is in what is left unsaid that I attempt to say. The difference, however, is that classical implies time-honored and time-tested which this really is not. For that matter, most dressage we see today cannot be called classical either. Let it also be said that classical does not imply 'kindness'. Many of the classical figures of the past were brutes and some of the practices of the past were anything but kind to horses. Just look at old paintings and drawings at the fear in the faces of so many of the animals; gaping mouths, terrified eyes. There was good and bad then, just as there is now.
So why can't 'good' classical dressage be sufficient? I believe it could be wholly sufficient but under only specific circumstances, namely that riders could develop on the absolute best trained school horses of ideal conformation and temperament, that the teaching would be available on a near daily basis, that it would be the highest quality instruction from gifted masters and that any training projects taken on would be with horses specifically chosen that are of excellent health and suitability for dressage. Training would only be allowed under the strict guidance of a gifted master. This all sounds very limiting. And it is! It is even unrealistic to expect that every parent could afford this for their children. And what might become of horses that didn't fit into the suitability category? These are problems that necessitate further thought.
Why is such strictness even suggested? Surely, many agree that we need more quality riding schools to teach people 'correctly'. If you were to read some of the classical bodies of written work you would get the sense that quite a lot is left unsaid. Why is this? Did those writers expect that we would use their understanding under the guidance of a master? Or did they expect that only a master would read their work? I rather think the latter is the case because the master would have the wisdom and maturity to convey the unwritten and guide the willing student to a special understanding of horse and rider partnership.
Taking these thoughts one step further, I believe the problem with training is mainly that we do not have a thorough enough grasp or appreciation for the deeper nature of the horse.....how intelligent he is, how sensitive, how emotional, how communicative, how willing. If we have come to love horses and find them friendly and obedient we have come a long way, but if we have forgotten or disbelieve that horses are ultimately prey animals with a hardwired sense for danger, we have missed the most significant clue for decifering good from bad training. We may even have accepted one training system because IT WORKS! That kind of training may be fear-based training. It works with nearly all horses but with a few, it does not. THESE are the horses that have spoken to me of another way. I will hope that anyone reading this has found this way without waiting for the resistant and impossible horse to show up in their midst. BUT if not, then I will also hope that what these horses have challenged me with is what they want everyone to know about all the other horses less fortunate who have not spoken.