But if the education system provides quality education with parental involvement, doesn't that imply that it provides quality education without parental involve

But if the education system provides quality education with parental involvement, doesn't that imply that it provides quality education without parental involvement? You know, since parental involvement is not a part of the education system. Or, in other words, if parental involvement IS a part of the educational system, then it's impossible for the system to provide good outcomes without parental involvement since, you know, it's part of the system. I guess what I'm saying is that I'm confused why some people seem to blame the educational system for lack of parental involvement in some demographics.