That is an outright fallacy of a premise. Since homosexuals are incapable of reproducing they cannot pass their 'genetic' makeup on to another generation. The population of homosexuals would disappear in no time. Its a choice not anything in the DNA.
Theoretically, a homo could have sex with a normal hetero and the child would have a 50% chance of inheriting the homo gene...IF it existed.
However, the infamous “homo gene” has never been found...not unlike the infamous “missing link” that leftists continue to seek to disprove God’s existence.
It all gets back to God and how leftists continue to reject Him and His perfect wisdom. That wisdom includes stating the homosexual lifestyle is a choice and so eveil that it’s an obamanation.
They are by no means incapable of reproducing.
Many a homosexual has kids of his or her own, that they got the old-fashioned way: by sexual intercourse with a person of the opposite sex. Many of these are people who were actually involved in normal (man-woman) marriages who later divorced, got custody of their children, and decided to form a new household with a new partner of the same sex.
That's sad and deeply disordered in itself, but it's even worse when gay people generate genetically-related offspring via the artificial reproduction technologies like artificial insemination, IVF, and surrogacy.
Surely you know that there are "fertility" clinics that cater almost exclusively to the lesbian clientele.
G-d wouldn’t have said not to engage in homosexuality if people were born that way.