The problem is that the cause of flaking skin can be diverse, and thus the solution will differ depending upon the cause. As an emollient & moisturiser I agree Jojoba will help TEWL, and thus may be used for dehydrated & dry skin, but if the skin is underlying oily there are far better alternatives. Indeed, if it's dehydration on a non-lipid dry skin, then something that not only decreases TEWL but also replenishes lost hydration would be far more suitable, such as collagen or hyaluronic acid.
I agree in principle that this is a site for general advice, and although I perhaps could have put across my point in a slightly less colourful way, what I was trying to get at is that as skincare professionals we should attempt to maintain some level of professionalism, such as not guessing at solutions to skin problems without even being able to examine it!