rahu rules the eyes, seeing is not believing. our perceptions are the biggest deceiver
and yes im aware planetary influence is more important than vimshottari ruler but i think the observation speaks to why rahu is in the air signs in the first place, in response to this thread i have gotten mars, venus, moon and sun. because there are several components to vision
however, im not talking about literal vision, im talking about perception and illusion. mercury is the natural interpreter. i believe its important to underline these things as my focus is mostly on nakshatras! (for now) mars and sun also represent the head where your ego is
lets also not forget that the moon has rahuketu nodes and this is why its so easily swayed and persuaded