dude you are missing one thing here ,that 99% of the hindus (including me) don't know about what is there in our books and what not . i personally have never even seen "gita" , me and even my parent's knowledge about ramayana and mahabharata is (mostly)only limited to whatever they showed in the tv series . sati was a very bad thing and it went away ! child marriage is a crime now in india ,it may still be practiced in remotest part of india(not sure) but soon it will be dead ,just like sati . honestly we hindus don't care / don't know what is written in our books , because 99% of us haven't even read 1 page of it . so quoting stuff is irrelevant
Quoting stuff without understanding it is irrelevant.
As per scriptures , a student has to adhere to Brahmacharya. So if a girl is a student, there is no way she can get married even as per Hindu scriptures.