dontjustfollow,
Your humble opinion (“IMHO”) is just that and nothing more. The Rabbonim, who are far wiser than you, have constantly and consistently bemoaned the appalling lack of tzinius and taken steps to correct it.
P.S. The Rabbonim are [gasp] men.
P.P.S. Tzinius is a halacha from the Torah and thus a “universal issue.” Halachically we are OBLIGATED to advise someone if they are violating ANY halacha if there is even a small possibility they will correct it. This obligation includes a man seeing a woman violating a halacha like tzinius. The only time one is exempt is if they are absolutely certain the tzinius violator will refuse to shape up and follow halacha.