It sounds rather simple, but not said clearly in the article:
India has free toilets and pay toilets. Men and women can use both. But women don't want to use the free toilets because they are yucky. So the article is portraying it as if the women are being denied the right.
I think the article sounds like it could be right: If India bans public waste-making, like America does, then it seems it has to guarantee people are able to make their waste someplace.
But wait, lots of places in America don't have city ordinances requiring the city to make public toilets available and free. So why should India? That sounds like a good counterpoint.
But imagine this: You get off the bus in a small rural town in the US and everything is closed because it's after 7 PM or so. The bus drops you off outside a closed store. You have to wait several hours for the next bus. You really have to go to the bathroom, because you drank alot of water or coffee. What will you do?
So maybe you have a right to public waste-making and the statutes criminalizing it violate this right.