I suspect her method can work (as can many other methods), but one point I disagree with her on is that it can work as quickly as using a correction. And of course it depends what kind of correction - for example we mostly just use a no reward marker “NO” which is not something the dogs want, as it signals they won’t be getting anything good, but it doesn’t really lessen their engagement - it just makes them try harder to be right. The NO is followed by immediately asking them to perform something they can be successful at (such as a spin or twist etc) which is then rewarded, keeping engagement up. I just think it’s easier for a dog to understand the difference between no reward and reward as opposed to some reward and higher value reward which is much more subtle.
I won’t say we never use physical corrections, but they are pretty rare, are never part of the teaching process and I can’t remember the last time I used one with Chloe, so although they are “in the toolbox” so to speak, they aren’t really part of the process at this point.