Her information is most certainly misplaced and incorrect. Yes, it is true that some of the natural enzymes in the honey are lost at certain temperatures (the same goes for many raw vs cooked foods) honey most certainly does not become indigestible. There are many people who substitute honey for sugar, many sauces that use honey, many foods etc.; suggesting that cooked honey is indigestible is someone who needs more correct education as they have been reading too much bad information on the internet. I even found an article suggesting heated honey becomes toxic; scary the misinformation that one can find.
BTW; We make granola (which uses raw honey) and granola bars (also using raw honey) though we have made baked versions and our hair isn't falling out from the toxic honey
BTW; We make granola (which uses raw honey) and granola bars (also using raw honey) though we have made baked versions and our hair isn't falling out from the toxic honey