My problem with that is that it places too strong a focus on specifically heterosexual intercourse as the only divine method of creation, and it erases the experiences of people who are not heterosexual and do not fit into the gender binary.
[in my witchcraft, I believe that ... ]
1) Every one of us has the capacity to embody all possibilities of humanity, regardless of gender identity. Strong, weak, independent, dependent, nurturing, distant, kind, mean, smart, stupid, selfish, altruistic, introverted, extroverted, loving, hateful, emotional, logical -- we have all been these things at one time or another. I identify as a woman, but since I am inherently capable of all of these things, I don't intrinsically need a
man, specifically, to "balance me out". My partner and I each bring a different subset of strengths, weaknesses, hobbies, interests, needs, and gifts to our relationship, but they are not limited or defined by our gender. As I talk about
in my post about Goddess feminism, I am interested in breaking down dualisms entirely, not recreating them.
2) So in my Goddess symbolism, I try to use a set of symbols that demonstrate the many ways in which creation can happen aside from heterosexual union, which, while important, is certainly not the only one. So I like to employ metaphors such as weaving, throwing a pot, etc. in my practice that are accessible by people of either gender. In the Charge of the Goddess, there's a line that says, "All acts of love and joy are My rituals", and I see that as an affirmation of any kind of consensual union (between people of any gender) as sacred.
You're also not the only one who has ever wondered about this subject. Here are a few links that I'd recommend:
One Gay Man's Response to Gender Essentialism in Paganism
Gender Essentialism is a Problem, Pagans
G is for Gender Essentialism
Oh, My Pop Culture Goddess: Transgender Issues in Wicca and Paganism
H is for Heterosexism and Heteronormativity
Philadelphia Pagan: Regarding Sexual Orientation and Identity in Wicca
Pagan Spiritual Paths and Men Who Love Men