Yes women dress to impress other women not other men. It is no different than and probably stems from the competitive nature taught in school. We are taught to “outdo” one and other and it doesn’t stop at graduation. As a matter of fact it goes full steam ahead because of shidduchim and how difficult that parsha is. Young girls going to Chasunas get their hair done professionally, get their make-up done professionally, have dresses custom-made, wear the highest heels, etc. All to stand out from the crowd and be noticed. Why? Because those “gorgeous girls” are going to attract the shadchanim, the mothers of the boys, etc.
And this is a message to ALL you men out there who have the comments. It is up to YOU (not you in particular but MEN in general) to tell your wives in the most gentle way possible, how you would like her to cover her hair, and no you don’t approve of her taking out hair and combing over the top of the sheitel, and you don’t approve of leaving the hair out and pushing the headband back, etc. It is also up to the husbands to say the skirt or sleeve is too short. Did it ever occur to any of you men quoting Gemara and Halacha that the men have just as much of an achrius here because they don’t say anything to their wives? Yes, the wives might try a little with one outfit or another, but a husband must communicate the halchas he knows and how he would like the hashkafas of the home to be. And if the daughter is not yet married, then the father must also sit down with his daughter and have a gentle conversation.