Home ed- who is it for?

my SIL is a private tutor and tutors a lot of home ed kids- secondary level. It came up after a family night out and I was a little surprised what she said.

Her opinion is that in her experience, home ed was more about the parents needs than the kids, and also in her opinion most home edded kids would do better at school.

Which is different to my experience- largely on here and other parenting/ SEN sites, which is that home ed is a common progression with SEN kids who aren't having their needs met at school...

So I thought it would make an interesting topic (I've deliberately done this seperate to Tootsie's thread)So- home ed... is it about the kids, the parents, bit of both??