Why did that Cardassian engineer flirting with O'Brien display outright sexism towards males being scientists or engineers? After all, shouldn't males be expected to deal with the rigors of those professions in such a militarized authoritarian society like theirs? But then remember all the Cardassian male characters you've met. To a man, each and every one of them including The Atoner from "Duet" was a scheming obfuscating Manipulative Bastard to the extent that you'd think such bastardry was their hat! And this kind of behavior is not tolerated in the scientific and engineering professions. So it is entirely possible that those women in this profession have internalized this stereotype of their species' males.
No wonder Kira can never get Dukat to leave her alone. If this is how Cardassians flirt she's giving him really mixed signals by belittling him all the time.