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It doesn't?
However, in the update: a brochure now called, "Answers to Your Questions for a Better Understanding of Sexual Orientation & Homosexuality," the APA's position changed.
The new statement says:
.. "Although there is no mention of the research that influenced this new position statement, it is clear that efforts to 'prove' that homosexuality is simply a biological fait accompli have failed," Byrd wrote. "The activist researchers themselves have reluctantly reached that conclusion. There is no gay gene. There is no simple biological pathway to homosexuality."
It doesn't. You're quoting Dr. Byrd, "a doctor who has written about the issue on the website of National Association for Research & Therapy of Homosexuality."
Which is to say, Dr. Byrd has an agenda, and most likely an income, that depends on his saying such things. I tend to distrust such fellows.
The APA's statement says nothing more or less than that the underlying causes are complicated. They most certainly do not rule out a genetic component; they do say that it's a complicated issue.
They need to drop this since the logical next step would be a gene-therapy “cure”.