Well, nice for you, Lass.
Many women settle for men who hate women, walk into that hell with seeing eyes. There are women who are of the opinion that all men joke about gang rape, and that therefore, one should marry such men.
Those grieving widows you talk about are perhaps not the same women who thought "Well, all men are shit, might just as well take this asshole".
(Though of course, some attachment will form if one lives with even the most horrid asshole for over fourty years. Interesting, that the widows still cope very well with the loss, isn't it?)
Of course a curfew for men would never be considered.
Actually, I think there was something like that in Spain. Only for one night, and only as a sort of publicity thing by the mayor, but apparently, someone did consider it.
... not in India, though.
Would be a very good solution - I think it worked very well in Spain, much less police needed, etc.