Yes I consider mental health issues as important as physical health issues, if not more.
Why? Because mental health is an under reported issue that people find difficult to get help for due to stigma, fear, lack of understanding. More effort and support is needed to help people with mh issues as they are often vulnerable and unable to access needed help.
Also mental health issues can create physical issues - neglect for physical health can lead to deterioration of health.
I have personal experience with mental health as I have anxiety and experienced severe anxiety and depression during my pregnancy. I am only now 3 years later finally feeling some significant progress.