There are surprisingly a handful of reasonable situations where it makes sense to remove your MacBook's screen, but the biggest and most obvious one is when your display is broken or cracked.
Fortunately, there are plenty of options available if you want to repair a broken MacBook, and most of them ... active (subject to a $99 excess fee for screen damage or $299 for anything else ...
AppleCare+ provides cover for unlimited incidents of accidental damage while it’s active (subject to a $99 excess fee for screen damage ... can return the broken parts to Apple to be refurbished ...