Firstly there is some science and some cheap thoughts both.
Secondly, yes there is difference in a boy and a girl, and i soul simply for fun does not get manifested as one of these. There need to be a reason and there need to be a difference.
Now coming at the disrespect and bad treatment, its a shame on mankind. But we are imperfect by our very nature, if we increase human values all other values of all other system automatically increases.
remember ignorance can be fought only with the weapon of truth and knowledge of this truth.
a female soul, being manifested is of more kala's than a male soul, because of its service attitude. it is more ready to be an enjoyed than a male manifestation.
and being more near to reality hatred in this unreal world is more.
when something is more true, all those things which are less true, until they reach that level of true nature, they will hate this truth for sure.
on earth it may be as female being dominated by male, and in other planets in other ways.
also with more cleanliness comes the heavy load of getting unclean, it is more easy for kaam beeja to execute in females, though males seem to wander around for sex always.
so it is a very complex topic, we cannot discuss in this small scope, but Dis respecting etc is an act of ignorance, females are gifted with special potential of housing soul, till sharira is ready for delivery in this world, they as part of prakriti , serve purusha by housing him in the macro scale, again as I told they are more ready for service and acceptance.
So they should be treated with love and respect, as divine manifestations of prakriti and not as a toy of sex , as they are depicted today in media etc. they should be respected for there capability and gift of being a mother.
They should be welcome in the family. with great respect , love and gratitude for the lord.
and as far as those things of hell, when son performs last right what happens, may be more good krama is generated is got when a father performs marriage of his daughter ans settles her life.
It is said that getting ones daughter married and allowing her to become a mother, in accordance with Dharma, is a great punya.
Lord Bless,
-- Deito
Harirnama Harirnama Harirnama kevalam.