Is it possible that starch intolerance could be a separate issue from klebsiella? That people are allergic to a compound in starch, and starch feeding the klebsiella is just a coincidence?

Everyone has their own individual intolerance to non-starch foods - nightshades, casein, lectins, salicylates, nuts/seeds. None of these things feed klebsiella, but cause joint pain depending on the individual. Could starch, or foods that contain starch be a direct culprit rather than klebsiella? Any theories on this have been discussed before?