We have an orchestra, although not a full symphony one, we have a jazz band as well which is well regarded outside of the school. We also have recording studios, all sorts of technology I don't really understand, dedicated theatre, art studios, pottery studio I could go on but it is not my subject area. We could of course have more but so could a specialist school. We have a very good sporting record partly because we have very good sporting facilities, large grounds with a variety of sporting pitches on, a gym that the public pay to use in the evening as well as the usual sports halls etc. We also do have a very good academic record which is why we often find that children stay with us rather than go to the grammar, as I said I would much rather my own dd went to my school than the grammar. We also provide lots of trips, infact I think apsrt from certain protected parts of the calendar there is constantly a trip on somewhere and we try to do big trips to at least one different continent every year. Our school is well known for going out of our way to provide whatever our children want or need within reason.
So I don't agree that if a child is highly academic that they need a grammar, as we teach ours very well within the conmprehensive system. Of course a sporty child will need a good sports team, we have those and excellent general facilities.
I also don't see a problem to be honest with parents spending their time to do things with their children, it is not just up to a school to provide everything. Very often what we do is stimulate interest, for example we take our students sailing, many love it and go on to continue that interest outside of school at weekends and when they leave. My dd does lots of activities through her school ( which is a state) from horseriding to ballroom dancing to pottery. As her family we enjoy helping her follow these same interests and more outside of school.
Of course you can always provide more but that applies to specialist schools, independant schools and grammar schools. I don't think there are perfect state schools all over the country, I have taught in some poor schools. But there are state schools, and probably more than many MNers realise that can compete with independant and grammar schools.
I am not saying get rid of grammar schools, I don't particularly like them but respect the fact that other parents do.