No, not assuming it was an uninformed opinion.
I'm thinking it through LOL Makes sense actually. Chicks in a brooder that's never had chicks before can absolutely have Coccidiosis. We know the oocysts are in their poop, but those have to sporulate and a large number have to be ingested in...
I would be interested in reading those professional articles. I have never read that Coccidia can be transmitted through the chicken egg to the embryo, so would like to learn something.