According to The American Federation of Teachers:

School staff often experience high levels of stress due to various factors. Access to mental health services helps in reducing stress, improving job satisfaction, and promoting overall well-being among educators.

According to The U.S. Department of Health and Human Services:

Mental health therapy not only benefits students but also positively influences school staff. When teachers and staff receive mental health support, it can contribute to a more supportive and cohesive school environment.

According to American School Counselor Association:

Providing mental health resources to staff can contribute to their professional growth and resilience, enabling them to better support students' social-emotional needs.