You can make the default locked down and still allow other operating systems, and most alternative operating systems will also come with a suitably strong secur

You can make the default locked down and still allow other operating systems, and most alternative operating systems will also come with a suitably strong security model that does not easily allow the user to fuck themselves. I don't think not locking everything down completely will inevitably lead to every elderly person becoming a victim of scam, so I don't acknowledge that argument.