This. They probably did this kind of vote so many times that many of the Gods would always vote the same. Just like in regular real life elections, some people choose a different party everytime while others will vote the same side for all their life. Maybe Nergal God of Death always voted the same the last few (thousands) times. Who knows?
But we saw that Gods of different pantheons sometimes get along with each others. We saw Rat and Tiamat, I can see Hel and Nergal. Maybe there is an annual work dinner between all Gods of deaths and they all eat pizza. Without Pineapples.
If this isn't the case, the "no" curse of action is also good for "she doesn't know".