I don’t know what religious belief you subscribe to but this does not accurately represent Catholic teaching.
science has not presented a shred of proof one way or the other on whether on not someone can be “born gay” so the Church does not presume to state it, either. What the Church does teach is the God’s revelation about the nature of his creation, Man and Woman, and the natural law that defines their use of the immense gift of sexuality as he intended. That will never change because natural law will never change, or can the Creator change.
This circumstance, like everything else that comes our way in life whether it is a gift, talent, temptation, or inclination to harmful behavior, can be a path to holiness and union with God if we allow him to use even the most difficult challenges in order to mold us to his will. If you make that your goal, the answers to your hardest questions will be given to you.
An inclination to any sin is not sinful in and of itself, but is the damaged part of human nature we call “original sin” in that it came into the human race in its origin through the sin of Adam and Eve, which was their rejection of God’s will and attempt to subtitute their own wills for His. The homosexual inclination is not sinful in and of itself, but the behavior, which is a choice most definitely, is a sin because it frustrates natural law, that is, the sexual order which God placed in humans of each gender at creation.
I have a disorder, diabetes, which may be in part genetic, inherited, or result from something present at birth, and in part from lifestyle choices or other influences over which I had no control such as childhood illness. REgardless, the disorder itself gives me the inclination to eat certain harmful foods–foods that are harmless or even beneficial to non-diabetics, but hurtful to me–and I know I must resist this powerful inclination to keep my health. This does not make me a bad person, it just means I have a challenge others do not face. But they also have challenges foreign to me that I don’t face or understand. But we all need compassion for each other.