Why is "Lesbian, gay, bisexual, trans." in "society & Culture" instead of "Family & Relationships"?

I had to dig a bit just to find questions about LGBT issues because it wasn't where I expected to find it. "Family and Relationships" is where I would have put it, but I'm wondering if this is another example of being denied legitimacy? What do you think?
Update: Are we not in relationships? Do we not become families?
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