If only. The school system is actually terrible at helping the most disadvantaged and marginalized students. These students would benefit the most from highly structured and directed instructional approaches that often have the pupils memorizing their "lesson" essentially word-for-word and getting prompt, immediate feedback on every question they answer[0] - but teachers who have come out from a proper Education department hate these approaches simply because they're regarded as "demeaning" for the job and unbecoming of a "professional" educator.
Mind you, these approaches are still quite valued in "Special" education, which is sort of regarded as a universe of its own. But obviously we would rather not have to label every student who happens to be merely disadvantaged or marginalized as "Special" as a requirement for them to get an education that fully engages them, especially when addressing their weakest points!
Modern "Progressive" education hurts both gifted and disadvantaged students for very similar reasons - but it actually hurts the latter a lot more.
[0] As an important point, the merit of this kind of education is by no means exclusive to disadvantaged students! In fact, even Abraham Lincoln was famously educated at a "blab school" (called that because the pupils would loudly "blab" their lesson back at the teacher) that was based on exactly that approach.
