Because it's Black people's place to do such a thing, yes? Where should this take precedent? Somewhere between abortions (per OP) and under, let's say, police corruption?\
this thread asks why Black people aren't fighting back against degeneracy.
UCLA study says "An estimated 3.5% of adults in the United States identify as lesbian, gay,or bisexual and an estimated 0.3% of adults are transgender."
These people aren't an issue let alone a concern among your average black family.
TL;DR - who gives a shyt?