We could ask what took so long, but we likely already know the reason (read the article to find out). The better question is... how can we (men and women) accelerate the trend of advertising that respects and inspires?!
P.S. - With all that said, I'm a bit disappointed that the image chosen for this article (shown below) is... a scantily clad and especially attractive woman, which kind of goes against the key points in the article. Hmm... two steps forward, one step back...
Insofar as there exist women who consciously and conscientiously decide to dress a particular way, I think it makes sense for the advertiser to meet them there, despite the objectifiers. Otherwise, you're basically empowering the objectifiers themselves, right? Who should have the power to decide how women are portrayed in the media? The answer is certainly not "disgusting catcallers on the streets."
Of course, there's a balance. If the ad portrays the act of objectification, that's bad. If the ad basically conforms to the male gaze, that's bad. But given that a bunch of actual women dress a certain way, I don't think it's automatically indicative of the male gaze that the model is attired just like the real-world prototypes. Just like it's not automatically indicative of Asian objectification to have an Asian woman as a model in an advertisement.