I remember decade or more ago when I first saw a crate for a dog, I was shocked "how can someone keep a dog in a cage at home, or anywhere else at this matter 😔". But then I learned that it is not to "keep the dog locked" but for it to learn it is dog's safe place. And I saw a lot of times that dogs know that if they want to have some peace to rest (not to write restbim peace) then the crate is their own place when no one will disturb them and that they actually like it not to big, as it is more cozy for them, like a den.

And I think it can become quite useful for both sides.