Having a mentor for your career is good for your career because it can help increase your productivity and increase your confidence in the ability to do the work.
Having a mentor can help you get a better work and life balance and a stronger time management.
Mentors can offer coaching and other forms of professional development that employees might not otherwise receive, increasing their sense of confidence in their work.
Additionally, mentees reported stronger time management skills and a better work-life balance after a year of mentoring.
There's no requirement to have a mentor for your career but having a mentor can help some people with their career.