Originally Posted by The Batman
Yes, because above all else, she is one of Batman's most well known, enduring, and popular adversaries, a female empowerment icon as well as a sex icon.
Catwoman's popular because of factors independent of her romance with Batman, though that also plays a role in her appeal. All those girls you listed were simply love interests, nothing more. Catwoman has many facets to her that appeal to people. As a character in her own right, Selina Kyle is great. As Batman's Love interest? Overrated.
Actually, Vale at least originally was much more annoying reporter intent on exposing Batman than love interest. She mainly suffers because she is totally a rip-off of Lois.
Madison I think is the type of character who could be really well developed if they wanted to, but with Clark Kent/Lois Lane already slated to have a major role here, I am not sure they have space to go that route.