Are PU colleges right in having a higher cut-off for girls as compared to boys during admission?

I sometimes wonder if we are people living in the 21st century. All the talk about equality and doing away with all forms of discrimination has yielded no result. Rather what i see is a rise in the number of incidences where one community or a group is trying to bring down the other or trying to trample upon the others right to live life with dignity as per their wishes. Be it the khap panchayats killing young couples in the name of honour killings or different religious groups fighting for reservations. N now this. Why should girls have higher percentages to secure a seat in the colleges? Why is their such a disparity? Are you trying to prove that girls are much smarter than boys who are plain dumb or there's something more than what is seen with the eye. If we talk about equality then it should not just mere statements made to impress someone rather one should also practice it in his or her life, which the PU colleges do not seem to be doing.