The watching of women in indecent clothing in any situation is not allowed. Sports etc should not be watched if this happens but if women are appropriately dressed then there is no problem. Men should lower gaze and guard their modesty; turn off or stay away from immodest conduct.
Men's dress is to cover what parts lead to indecent thoughts by others, which can be deduced from what women have to cover.
The Quran gives principles in one setting that can be applied to other settings, thus reducing the need to gives volumes laws for us to follow which becomes restrictive. Societies, according to how the Quran should be made to work, should ebb and flow with changing times but always keeping in mind the values of the Quran.
The Jews were sanctioned for asking to many irrelevant questions so their sacrificial calf became a burden rather than a straightforward act.