In the abstract I don't think anyone is; what's contentious is what measures make a school "high-quality."
Everyone wants to do better. Just because people don't agree on means doesn't mean they are cold hearted bastards or something.
Except we have lowered speed limits and mandated security measures on cars, just not to the arbitrary level you stated. We followed scientific studies that showed positive results of lower speed limits in certain areas and implemented car safety requirements for manufacturers.
With car accidents, a problem was identified, scientific research was consulted to craft solutions, they were implemented, the numbers improved. This is likely because everyone, regardless of income level faces the risks of driving. Bad schools can be avoided by having more money and living in an area with good schools.
We should make every school high quality. I'm not sure why anyone is opposed to this idea.
>Secondly, not having disruptive kids in class.
If that turns out to be the 2nd order thing we can make that happen with sufficient effort too.