I went to a Math/CS magnet program for high school with selective admissions. It wasn't racially diverse and 90% Asian, but most of them were born into working class families. Virtually everyone went to top universities and did extremely well. My brother who went to a top tier private school used my teacher's math curriculum.

They eliminated the selective admissions after I graduated and now the program is worse. The teachers teach less because the students cannot learn. The students don't go to top universities anymore. But it is diverse and equitable.

I don't want to live in a world where I must buy my children access to education. Not getting into a good university and being forced to suffer the consequences of my actions made me realize the value of hard work.

If from 0-18, the determinant of my children's success is how much money I spend on them, I'm not teaching them to be better than me.

OP is sharing their experience, and you are sharing yours. neither experience is universal, and it has nothing to do with wanting to privatize education. rather it is a call for reform of the school system. (all public schools should adopt the montessori method in my opinion for example. it's not expensive. it takes just one year of training for teachers)