It's really 4-6% if you include both men and women.Actualy real gays are no more than 2 or 3 %.
All the rest are psuedo gays.
They had become gays they were not born gays.
This is certainly an issue.
You can't become gay.
Bisexual is another matter, and has not been studied as much.
We have a term that is used here. It's is "reactive gay". It's not a very good term, but then neither is "homosexual".
A "reactive gay" person, usually a latent bisexual and female, who elects to be lesbian as the result of some form of trauma, often molestation, incest, rape, or prolonged spousal abuse. Theoretically, if the trauma is healed, the person regains the fluidity that is their particular nature. But the question remains, "Why should they have to?"
During my professional years here in the US, I encountered a significant number of reactively gay women, and only a few men.
Now there is another class that we do not have a good descriptive term for: young boys/men who have been the victim of predators, and who are very confused about their true natures.
As discussed elsewhere about the weaker people in prisons, they have not been the victims of gay people. As in prison, they have been victims of hedonist predator sociopaths, most of whom are of hetero orientation. These victims can helped through their confusion. They may have been confused from an early age, but they are not gay or bi.
Starting in the 1950s, the State of California (and others) funded extensive research into "curing" gay orientation. A lot was learned, including that gay orientation is not a mental illness, and that it cannot be changed. Gay people may HAVE mental illnesses, but their orientation does not operate as one of those. A lot was learned, including that there were a number of psychiatrists that were sociopaths like Josef Mengele.
These researchers would have guaranteed for themselves a great amount of further research money for the rest of their lives IF they had ignored what the research was showing.
Science is not democratic.