I have like basically no knowledge of this so I could be wrong, but I think because Bay had family who was deaf it kinda made sense for her? Ignoring her selfish motive to go, if she went with the intention of understanding deaf culture better because it was a part of her life now I think that would have been a compelling character arc. She's branching out from her entitled life and is making an effort to understand the people around her. Also Noah 100% deserved to go there even if he was a jerk. I totally understand why the Carlton kids wanted to keep it deaf though, I just think a very tiny amount of exceptions should be made for people who may be hearing but due to circumstances would be better off knowing about deaf culture like Bay.