Uhh... sure. If you don't want to call it fermentation that's ok. Though I don't imagine human gut bacteria are respirating, or some other more exotic form of metabolism.

Point is, the products of bacterial metabolism of sugar in the human gut tend to cause issues, as in lactose intolerance, or the more rare sucrose intolerance. Hence my request for a citation on fibre delaying absorption of fructose so that "bacteria get most of it".