You’re certainly not wrong, but under the circumstances, common sense should demand caution. Everyone involved should have demonstrated more concern.
I agree — these are extraordinary circumstances, and an abundance of caution is called for.
However, it still smells like blame-shifting to me. The CDC, the Hospital, and anyone else responsible for the protocols that are supposed to keep health-care workers (and the rest of us) safe — they all blew it. Now, they’re trying to lay the blame on someone who they failed to protect.
Perhaps the nurse was culpable — perhaps she lost all sense of reason, because she really wanted to get to that wedding. I doubt that — who wants to gamble with the lives of their family and friends? More likely (IMHO) she was thinking that she was safe, because she did what the CDC and the Hospital medical staff told her to do.