Well you can't out-stubborn me Kiwi, but I am glad to hear you're not offended.
1. I agree that fresh coconut has no starch, but they have to do a lot of processing to turn raw coconut into flour. It is normal for high temperature processing to convert sugars to more complex carbs, including starch, which is what I believe happens here.
2. garlic at least has an additional problem that it can irritate the digestion, which would exacerbate our problems; ginger is talked up as being this wonderful natural anti-inflammatory -- but the mechanism isn't a good match for AS inflammation (as opposed to boswellia which works on TNF-alpha). From what I've heard, ginger has been mostly disappointing for KA members, even those who are not watching starch at all (so the additional starch is negligeable). On the other hand, coconut
may have an advantage of some chemicals suppressing gram-negative bacteria; believe there have been studies done with coconut oil, rather than coconut flour. Plus I just saw someone mention that inulin improved their digestive balance, while it does the opposite for others; so the high fiber may be benefiting people with enough beneficial bacteria to take advantage of it.
3. Food labels may be inaccurate, but it seemed pretty weird for the manufacturer to come out and state that coconut flour has starch when it has none -- pointlessly losing themselves a sale.
I suppose all coconut flour manufacturers could have looked up some standard value -- that happened to be quite faulty -- instead of actually sending their product to be tested. Oh, and then they slightly tweaked the value with respect to other brands, so that the govt agencies wouldn't notice, that would explain why they are all significantly wrong in nearly (but not exactly) the same way...
If I were into conspiracies, I'd suggest that the same people who sneak corn starch or tapioca starch into nearly every American food-product were responsible for this campaign of misinformation about coconut flour

P.S. not trying to make fun of you with that last crack about coconut-manufacturer conspiracies, just trying to have a little fun with what is actually a sad topic for me (I hate not being able to safely eat coconut baked goods)