Board Thread:Episode Discussion/@comment-4141313-20190119003858/@comment-4141313-20190131165330

I think it was more under the belief that he forced it on them with no choice in the matter, meaning she was pissed he'd do that without their consent.

I mean, I'd be kinda pissed if I suddenly woke up as a hummingbird one morning with no idea how to turn back, and had to work for someone to learn how too.

Obviously he didn't do that, but the only other source Yang had was Raven, who as we've seen, is not really reliable a source, and Yang believed her anyway.