No. Good schools are schools that educate the children to achieve the best that they possibly can whatever their level of ability, give them a lifelong love of learning, support creative thinking, give them opportunities that they wouldn't get elsewhere, open their minds, challenge their beliefs, express themselves and equips them find a place in society that fulfils them. Or as much of that, and more, as is appropriate.
That isn't the same as good results expressed as an overall average of GCSE scores. It might be, but it often isn't.
Most people just like a good high results score, and get in a frenzy for a place at that school.
I believe all children are born with a love of learning, so I don't see how a school can provide this, they can destroy it or promote it.
I would like to know what opportunities are available only in school, no where else?
Again opening minds, children are born with open minds, a school can only open something that is closed, if a child's mind is closed then someone has closed it.
Good parenting is what you are describing, school is just the child care.
It has been studied many times and the conclusion is, parental involvement is the most important factor in children's academic success.