Can a circuit breaker go bad just by turning it off and on?

A breaker is a mechanical device and certainly would wear some with manual on and off usage, but it should be minimal and should not cause a problem unless it were defective. There are many commercial applications where the breaker is used for daily on/off use for lighting and other functions. The breaker can fail by having a mechanical part malfunction or perhaps arcing between contacts that would corrode or fuse mechanical contacts.