This study doesn’t seem very convincing to me.
Just to give one example, she says, " higher prevalence of homosexuality in the urban versus rural area." I’m sure that there are more gay people in urban areas, but that’s not because more of them are born in urban areas than rural areas but rather because many of the ones who grew up in rural areas fled to urban areas where there is a higher concentration of other gay people, more anonymity, and a more liberal and less conservative environment. I’m gay and I grew up in a rural area and moved to a big city the first chance I got.