Who needs to focus on cybersecurity?
In general, anyone with a concern about the consequences of access to a system needs to be concerned with cybersecurity.
For example, if an individual does not want a third individual to see a message to a friend, cybersecurity for the individual's phone and the friend's phone should be considered.
Another example may involve an organizational computer system that is designed to allow only access to certain data by a small group of people. If that data becomes available to anyone outside of that small group, the organization may lose money, perhaps by contractual stipulation or government regulations (data privacy requirements).