You may be on to something. The highest form of Cardassian literature is the repetitive epic, and
The Never Ending Sacrifice is about seven generations of Cardassians serving the state. It might be propaganda, though, but if it is it's apparently well received propaganda....
On the other hand, this was Garak's opinion, and Garak was previously near the top of Cardassian government and therefore society. His views might not reflect the population's.