I think this is a matter of looking at things, and I look at it differently. If her stylist came away with the impression that her "expertise" was being doubted b/c the Treasure tried other methods that worked, then that is
her problem, not Treasure's. The truth of the matter is that the way she is styling her hair
is inferior b/c she highlighted her hair, which has caused breakage and damage. It sounds to me that Treasure was getting inferior haircare, called her stylist on it, and now her stylist is mad, defensive and making insane excuses for her hair growth, and criticizing methods that WE all of this forum know work. It would be one thing if Treasure was dousing her hair in snake's piss nightly, then going to her stylist saying it's growing. She is using MTG which works for a lot of women on this forum (not me, but many...) and thus has been proven enough in that regard. While her stylist is criticising taking stuff made for horses, I don't see her saying a thing about the harsh chemicals she herself is putting in Treasure's hair that damaged it.
Anyone with intelligence, and confidence in their own knowlege knows that what they do for their clients is only the tip of the iceberg and the real care and maintenence occurs at home, by the client. Doctors, personal trainers, and good hairdressers know that they can do their best in their session, but it is up to the client to follow a healthy regimen to maintain their work. If her stylist doesn't like what she's doing on her own at home, why hasn't she given Treasure a regimen to follow in between salon visits? "Licensed" definitely doesn't not equal "expert".
In my profession, no I wouldn't want to feel that my knowlege is obsolete, that is why I read, participate in continuing education, and listen to what people say with an open mind and when someone says something I've not heard of, I go read and learn the pros and cons of their "home grown" remedies, to let them know that I know what they're doing is safe, or not.
I hope this didn't come off as an attack or challenege to what you've written. I am peeved at her stylist, not anyone else.
Oh, and my advice Treasure, is to find a new stylist