I wondered if you had your hard hat on when creating this thread! I have been a teacher for a long time and taught in state schools for 12 years. I then fell into a boarding environment by chance.
I can confirm that safeguarding is possibly even more robust than in the state sector because nobody wants anything but the best for the children. Everyone at my school is trained up to DSL level. Never say never, so we all stay vigilant.
Yes, some of the more “prestigious” boarding schools are tricky to get into and they use Cognitive scores (CATS) to judge underlying ability, on top of extensive interviews, tasks and“taster days”, as well as exam results over time. Family connections are honoured, but are not usually the reason for a place being offered.
I don’t send my own child to boarding school, as that wouldn’t be right for them, but I have had my eyes opened. Pupils really are highly privileged and have many more opportunities than most children. However, a very good number of parents are raising their wealthy children to be humble; I teach some absolutely lovely young people. Our school does a lot for charity and regular partnered projects with local schools. Teachers move from state to independent and back again happily.
Competition is encouraged and generally young people at barding school become accustomed to all having the same as each other; same size bed, same dorm, showers, food. They become quite good at focusing on the group rather than just themselves. Sport also encourages this mentality; work as a pack but rise to the top where you can. That was something that surprised me.
It isn’t right for everyone.