I don't think that's actually the case with the Crystal Gems, but I can't cite anything ATM. Rebecca Sugar has recently come out as nonbinary herself (I think she still uses she/her?), and I do recall an argument that if she was prioritizing "trick the network into showing gay content", she/the team would've pulled the same move with Bubbline in Adventure Time ("It can't be gay, because Princess Bubblegum is candy, and candy doesn't have a gender!").
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I don't think that's actually the case with the Crystal Gems, but I can't cite anything ATM. Rebecca Sugar has recently come out as nonbinary herself (I think she still uses she/her?), and I do recall an argument that if she was prioritizing "trick the network into showing gay content", she/the team would've pulled the same move with Bubbline in Adventure Time ("It can't be gay, because Princess Bubblegum is candy, and candy doesn't have a gender!").