You are absolutely right! The Vatican addressed this years ago.
“Homosexual unions are totally lacking in the biological and anthropological elements of marriage and family which would be the basis, on the level of reason, for granting them legal recognition. Such unions are not able to contribute in a proper way to the procreation and survival of the human race. The possibility of using recently discovered methods of artificial reproduction, beyond involving a grave lack of respect for human dignity,(15) does nothing to alter this inadequacy.”
These young people don’t know what they’re supporting, and need to do some research.
For instance, there are more “gay” children who have gay adopted parents than who have heterosexual parents.