Barrett's testimony implies that she thinks all people can simply choose their sexual orientation.

I don't investigate all the associations and attitudes of an organization before I give a talk for it. I don't have time. (Indeed, I expect, when I give a talk for a university, that it is doing some harmful things that I publicly condemn, such as developing nonfree software, obtaining software patents, and teaching that it is wrong to share copies of published works.)

So I think it is possible that Barrett did not know about those specific positions of the ADF when she gave talks for its fellowship program.

But it is also possible that she knew them and agreed with them, and is now covering it up.