In a lot of the US, homeschooling is entirely about religious separatism, not better educational outcomes. My wife’s old moms group would keep trying to sell us on homeschooling and the sales pitch was always about legally avoiding certain topics that public school covers. It’s never: “homeschooling lets your kid zoom past the shitty public school system”. It’s always “homeschooling let’s you teach from the Bible and protects your kids from evolution and sex ed (and nowadays: protects your kids from “woke”, whatever that is)”.