It wasn't a hill to die on. If it was she would have made support for trans rights a central part of her campaign. Trump made it a central part of his campaign.

"Never say anything that the right can play in an ad" is not my idea of effective campaign strategy.

It was a hill to die on in the sense that her campaign was getting killed and she said nothing. The ad was actively damaging her campaign so doing nothing was dying.

Why do you think she didn’t say anything?