It is literally some of the only lore on Games Workshop's Cathay that we have. Besides, it's not as if it isn't intuitive. Why wouldn't their attitudes trickle down?
What. Cathay isn't the Empire. Stop trying to apply the conditions of the Empire to Cathay! What the fuck.Because no Cathayan peasant has ever met the Celestial Dragon Emperor, they are far more likely to have met some poor bugger who was born with mage talent and went bad/turned to chaos or worse. We know that the magic of dragons and the magic of humans is the same, but I would be surprised if Cathayan peasants make that comparison anymore than imperial peasants understand that divine magic and scary chaos magic come from the same plane of existence.
No, the interaction that Cathayan peasants would have with magic-users would be them being retrieved by Astromancer cabals to be trained as wizards. Are the humans of Karak Eight Peaks magophobic? No. Why would the fuck would Cathayans be?!?!!