No, you do not have to personally experience mental illness to believe in it or understand its impact on others. Mental illness is a real and significant issue that affects millions of people worldwide, and its existence and impact are well-documented by scientific research and the experiences of individuals, families, and communities.
Believing in mental illness does not require firsthand experience of it any more than believing in physical illnesses like cancer, diabetes, or heart disease requires personally having those conditions. Just as medical professionals and researchers study and treat physical illnesses based on evidence and knowledge, mental health professionals, psychologists, psychiatrists, and researchers study and treat mental illnesses using scientific evidence and empirical data.
Empathy and understanding are essential in recognizing and supporting individuals who may be dealing with mental health challenges. Even if someone has not experienced a mental illness themselves, they can still be compassionate and supportive towards others who are going through such difficulties.
Being educated about mental health, listening to the experiences of those who have dealt with mental illness, and being open to learning about the subject can all contribute to a more empathetic and compassionate understanding of mental health issues. Remember that mental health conditions are just as valid and deserving of care and support as physical health conditions, and belief in their existence is based on evidence, research, and the experiences of countless individuals.