I feel your confusion! I think the rosacea trigger lists eg on the forums or in the books are only intended to be helpful collections of what other people have found cause their flare-ups. Obviously not everything on the list for one person! People must be different according to their diet history and metabolism and food intolerances, as people are allergic to different things.
I understand it's more personal - a question of noticing what happens to your eyes after eating certain foods to find out if they make things better or worse, or don't make a scrap of difference. If honey is helping with allergies and doesn't make your eyes flare-up worse, then why stop?
Whereas, with the fish/flaxseed oils researchers have measured improvement in the meibom consistency so docs are confident to recommend trying that, but that's as far as we go with certainty in the diet/inflammation theory so far!
Paediatric ocular rosacea ~ primum non nocere