Frankly I don't see the difference. It fascinates me that people separate NH, both those that do it and those that don't.
At the end of the day, whether it be some NH named brand or more traditional training methods, they are the same.
95% of training going on around the world with horses is trying to establish control of components - head, neck, shoulders, ribcage and hind and doing it using negative reinforcement techniques. (ie do it or else)
Whether you use a carrot stick, no stick, rope, wear a cowboy hat or a hardhat makes no difference.
If people got passed that on both sides then we could actually focus on what makes a difference, and on progression of skill, instead of the same junk recycled over and over.
As for dumbing down, sorry but I blame the US. Guys I have list of American friends so no offence intended (they largely agree tbh) and I would love to live there, but as a culture everything keeps being dumbed down. Here in the Uk we are following like sheep as usual. I blame the media, but nothing lasts more than 30 seconds, takes any attention, focus or commitment, and everything is disposable.
The biggest single change we could make to every horse? A celebrity horseman who could make anatomy interesting and sexy. If I meet one more vet or farrier who doesn't know what a Frog spine is or has no concept of muscle fascia and their importance, or still believes magnesium is a calmer - I'll scream!