Not correct.
Even a child of a divorced family knows they have a mother AND a father even if one of them is not there. It is part of the parenting class which all divorcing parents are required to take when undergoing a divorce involving children.
A child with a deceased mother or father knows they had both mother and father at some point.
Homosexuality by defenition is inappropriate to the raising of children. Children trapped being raised in that environment will never be able to be in a normal family environment. They are trapped with two adults whose self definition is recreational sex based on a fetish.
Even a child with a gay parent knows that they have a biological mother and father, even if one of them is not there.