a theory as to why gay people exist viewed through the lens of genetic diversity and its possible advantage. THEORY BELOW IN THE DESCRIPTION. (i'd love some feed back)

WARNING/DISCLAIMER:first off id like to state i have a scientific bias as i am gay and have a form of schizophrenia. the reason this can be considered a bias is that my theory could be considered as a form of social placation and a form of emphasis on the possible positive traits that could occur as a result of my groups existence and should be noted as a personal bias toward wanting my theory to be correct.


FACT:
people who are gay have a much higher chance to have a mental illness or hormonal disorder than the average person.

THEORY:
having gay people around may reduce illness transferred genetically via the people in question not producing offspring which in theory should over all befit the population.

RESTRICTIONS:
1: CORRELATION VS CAUSATION
1.1:it is possible that having a hormonal or mental illness may be a cause of people developing sexually into gay people.
1.2:it is possible societal pressure on a homosexual individual may be the cause of mental disorders within the community.
2: GENETICS VS ENVIRONMENT
2.1:not all mental illnesses or hormonal imbalances are genetic.
2.2:it is not certain to what degree genetics or environment play a role in homosexuality or mental disturbances and hormonal disturbances.
3: TESTING
3.1: as far as im aware there are no studies to back up this claim and it is just a hunch.