Why should they police what users can do with their devices at all? Providing strong guidance for the purpose of security seems reasonable considering that not

Why should they police what users can do with their devices at all? Providing strong guidance for the purpose of security seems reasonable considering that not everyone is computer-literate. Anything else, that is policing content, seems self-serving (upholding brand image or whatever), dictatorial (imposing moral values, such as nudity == evil) and user-hostile.