For example, she makes the striking claim that ”…the sulphate minerals found in Epsom salts are detoxifying. Epsom salt baths can stimulate the lymphatic system and support the immune system.”. This sounds like pure woo to me, but I’d be glad to see the evidence. (Chances are, that whenever you see the word “support”, it’s connected with a wild health claim with little or no evidence).
You mention probiotics and fermented foods: which ones? You claim that there is “plenty of science”: can you share one or two of the best pieces of evidence, with regard to celiac disease?

More generally, with a few exceptions, there seems to be surprisingly little convincing evidence that dietary microbes have “probiotic” activity—despite their popularity with the general public, and the claims of the supplement industry.

BTW I think you may be confusing arrogance with skepticism: one of the key elements of science is that, by default, something is not true unless it is proven. This is rather like a court of law, where the presumption is “innocent until proven guilty”.