"想上的话可以上私立". The reality is most families can't afford it. Otherwise, there would have been no points to have such a proposition.
As a group, I think well-educated people are a society-stablizing force. The higher the percentage of well-educated people, the better the society. There are and there will always be very destructive forces. We need stronger stabalizing forces to counter it. It is a a long term thing.
Same goes for stable families, since family is a big part of education. The data show that the percentage of criminals from unstable families are much much higher than general population. Policies must look at the big pictures, right?