So there is not "proper" explanation to Mahr, some say gift for family, some say gift for bride, the Quran say one thing the PEOPLE do something else. Where does this end?

In India, the dowry system still exists, with more people being educated, grooms and brides to be do not entertain this giving and receiving of dowry. Its actually illegal now. If anyone is demanding dowry they can be taking to court. But does that stop the brides family from giving a "gift" to their son in law? No it doesnt and its also accepted.

In other parts where people are still not educated enough this does go on just like everywhere else. Its the SAME thing and nothing you can say is going to make it any different.