No, that would be your government or employer preventing you from using your specialized skills to earn a living. In theory, a competitor can hire you for your

No, that would be your government or employer preventing you from using your specialized skills to earn a living. In theory, a competitor can hire you for your skills - but your new employer will make it clear they are "only hiring you for your skills, not your proprietary knowledge". I've see that clause even as a junior employee.