@daasyochid
I don’t understand anything that you have said.
Point #1 The only reason the boys can ask for money is that they have an unfair advantage due to their marrying younger girls which there are more of so the boys have the upper hand and can make demands. Remember supply and demand.
Point # 2
If there were equal amounts of boys and girls in the game- both sides would equally feel the pressure to compromise. Since there is not due to marrying into an age gap scenario once again boys can do whatever they want
Point # 3
Once again it may be true what you say that the seminaries are trying to make money but the only reason that all the girls all of a sudden feel the need to go the Israeli seminaries is to impress boys so that they will not be on the losing end of this unfair game that the boys are playing. Once again if the numbers in the game were equal there would be much less pressure to do all sorts of things to impress the boys and everything would work itself out organically.
So as you may notice the MATH is driving all of this. Additionally even when people are getting married they are marrying girls in many cases that are out of their league-because they could- and then they are finding it difficult to maintain.
@syaglchochoma G-d in his torah states what age boys should start dating. Please don’t now blame g-d for this when we refuse to heed his advice