I didn't down-vote you, but in my opinion it's not meaningless because it makes it inherently more testable. Try testing an opaque class without any accessibility into its state. It is much more difficult. If it takes in the state, performs an operation, and returns a new version of that state (ideally an immutable copy) then it becomes much easier to test and validate.
The reason information hiding is/was advocated was for reduced coupling. But in reality I find that this coupling becomes implicit which is arguably worse. But this is just my opinion.
The reason information hiding is/was advocated was for reduced coupling. But in reality I find that this coupling becomes implicit which is arguably worse. But this is just my opinion.