Why Didn't Maggie Take The Stand?

Jason Kuznicki is still amazed at "how extraordinarily weak the expert testimony for the defense was" in the Prop 8 case:

I asked myself couldn’t they have gotten Maggie Gallagher to testify? She comes across as reasonable most of the time. She might have offered one of her frequent catch phrases, that societies that “lose the marriage idea” die out. As a sound bite, it’s frightening and often convincing. But at trial, she’d have been asked the obvious follow-up question name just one such society and a moment of hilarity would have ensued, because there aren’t any.