It's worrying how many people seem to believe they have complete and total ownership over their children, as though the children are not people in their own right.
They are registered at birth, they see doctors, opticians etc.
Why do people keep banging on about GPs? How often would you expect a typical able-bodied teenager to attend GP check-ups? Plenty of children and teens rarely or never seen a GP, with or without abuse. Besides do you really expect an optician to pick up on signs of abuse, or that a child will have enough time alone with their optician to feel safe disclosing abuse?
There are very few cases of children being shut indoors and never leaving the home
No one has any idea how many cases exist since there are no records. Besides no one is claiming cases like that are commonplace (though they clearly exist) but that much more lower level abuse and neglect exists. It's not just families who actively decide to de-register as a deliberate front for abuse. It's also families who are generally a bit chaotic, who decide to de-register because they can't be bothered or don't want to deal with being hassled over school attendance, and the kid is left to fend for themselves. Maybe the kid gets slapped around a bit, maybe there's no physical abuse. Kids who aren't being locked up, or raped, or severely abused. But they're clearly being neglected and abused in other ways. Kids who hang around parks and shopping centres all day. Kids who receive no education. Those kids are invisible. Those kids don't count. Those kids never end up in court or the press.
www.home-education.org.uk/articles/article-safeguarding-myth.pdf
An unpublished, non-peer reviewed article written for a website called "Educational Heretics" that has no link to any kind of official body, was created by "a team of volunteers including a barrester [sic]", and looks like it was created using Geocities Page Builder circa 1995, is hardly a reliable source.