Did you honestly just use "easy mistake to make" and "professionalism of flight crew" in the same sentance in reference to this incident?
Yes I did. Because professionals are allowed to make mistakes. Sometimes they're small, sometimes they're massive (like this example). Note that I'm not condoning their mistake, but rather saying that a mistake does not imply an unprofessional attitude. That would be called negligence...which I don't think happened here.