Why do childless people think they know about education?

I know it is my own fault that I brought it up, but talking to childless people always brings out the combative side in me. I get the same thing, it is not the schools fault that children are not successful. Last night it was the same, I went to school. I learned nothing and you just have to go and who cares if you learn, besides learning is something that parents are in charge of. And you need to support the school by not fighting against it. My favorite part was the argument that we don't need to change schools for minorities to learn, wait I should mention that Latinos, Asians are not having a problem in schools. So changing schools for 13% of the population. Argh even when I think about it I get frustrated.
So now I have to look up the information.
Here are some stats from 1998:
EXECUTIVE SUMMARY

The report's main findings are the following:

* The national graduation rate for the class of 1998 was 71%. For white students the rate was 78%, while it was 56% for African-American students and 54% for Latino students.
* Georgia had the lowest overall graduation rate in the nation with 54% of students graduating, followed by Nevada, Florida, and Washington, D.C.
* Iowa had the highest overall graduation rate with 93%, followed by North Dakota, Wisconsin, and Nebraska.
* Wisconsin had the lowest graduation rate among African-American students with 40%, followed by Minnesota, Georgia, and Tennessee. Georgia had the lowest graduation rate among Latino students with 32%, followed by Alabama, Tennessee, and North Carolina. Less than 50% of African-American students graduated in seven states and less than 50% of Latino students graduated in eight states for which data were available.
* The highest rate of graduation among African-American students was 71% in West Virginia, followed by Massachusetts, Arkansas, and New Jersey. The highest rate of graduation among Latino students was 82% in Montana, followed by Louisiana, Maryland, and Hawaii.
* Among the fifty largest school districts in the country, Cleveland City had the lowest overall graduation rate with 28%, followed by Memphis, Milwaukee, and Columbus.
* Fairfax County, VA had the highest overall graduation rate among the districts with 87%, followed by Montgomery County, MD, Albuquerque and Boston.
* Cleveland City had the lowest graduation rate among African-American students with 29%, followed by Milwaukee, Memphis, and Gwinett County, Georgia. Cleveland City also had the lowest graduation rate among Latino students, followed by Georgia’s Dekalb, Gwinnett, and Cobb counties. Less than 50% of African-American students graduated in fifteen of forty-five districts for which there was sufficient data, and less than 50% of Latino students graduated in twenty-one of thirty-six districts for which there was sufficient data.
* The National Center for Education Statistics (NCES) finds a national high school completion rate of 86% for the class of 1998. The discrepancy between the NCES’ finding and this report’s finding of a 71% rate is largely caused by NCES’ counting of General Educational Development (GED) graduates and others with alternative credentials as high school graduates, and by its reliance on a methodology that is likely to undercount dropouts.