No, I don't. It isn't my place to tell them where they should send their kids to school.
In some cases, they have had concerns about their local state provision, and they have paid to go private while believing that there should be better investment in state education.
In some cases, they have had specific concerns about their individual children, and have felt that the private schools that they have chosen might be more nurturing/more pushy or whatever.
In some cases, they work long hours or with long commutes and it has just been more convenient to choose private education.
I don't judge their motives, any more than I judge anyone on here for using private schools. I have consistently stated that, while I have a political preference for state education, my responsibility to my dd comes first and I would absolutely send her to a private school if I thought that that would be best for her. Knowing what I know about my dd and the local options available to us, I concluded that it wasn't worth it, but others will have different children and different options, and some will no doubt reach different conclusions.
I am not criticising anyone for the decisions that they have made. I don't think that private education is good for society as a whole, but I totally understand why parents make what they consider to be the best choices for their children. I have done the same. I am merely stating my very firmly held view that private education is not necessarily better than state education. There are pros and cons to each sector, but ultimately it depends on the school and it depends on the child.