Well, yes, my career has involved roles which have brought me into close contact with various educational institutions at all levels, including quite a lot of private schools, many of which I have visited and had ongoing working relationships with.
FWIW, I'm not sure if it's right to say that I disapprove of private education as such. I do think it would be better for society if private schools didn't exist, but I would prefer to achieve that by making state schools so good that they go out of business, rather than forcing them to close. Not realistic, I appreciate, as state schools would probably need to be significantly better than private schools before people would let go of their perceptions about the advantages that private schools can offer, but that would still be the ideal from my perspective.
I certainly don't judge individuals for choosing private education if they can afford it and if they feel that's what is best for their own children. I would do the same if I felt that it was worth it. Most of us just have our kids' best interests as a top priority, and I can't judge anyone for that.
I do get irritated by the rather ignorant but common assumption that private is always better than state. I think there are some absolutely wonderful private schools that do a fantastic job, but I think there are also lots of very mediocre private schools that are a monumental waste of money for a lot of their pupils. Just as there are fantastic state schools and very mediocre ones. People should judge the individual schools, not the sector, and they should not be seduced by the slick marketing.
Of course, there are individual differences for children too - some kids understandably need more attention or more pushing than a state school might typically be able to offer, and/or they might have individual needs/specific family circumstances that make private a better option.
If I had the power to decide I don't think I would actually abolish private schools or take away the right of parents to choose. Tempting as it is, benign dictatorship is not really my style.
In any case, the much bigger priority for me would be to tackle the massive inequalities that currently exist within the state education sector, as that is really what is holding social mobility back in this country. Private education doesn't help, but it isn't the main problem as far as I'm concerned.