Glad you want to talk about this

... Sure they have let goats in, but they
have not issued full admission of goats into the stadium as welcome guests. Instead, they have used them as props in campy attempts to "break the curse" but their attitude towards goats has not changed. The indications from the descendants of the wizard that placed the ju-ju on them are that they must actually "want" the goats in the stadium and admit them as welcome pets, (like you would do with a service animal like a seeing-eye dog)... which is the context in which the original goat was ejected. These campy measures that use the goats as props will not work.
EDIT: Although... thinking about it, if the curse is actually on them winning World Series games
in Wrigley Field instead of winning it over all, then they could technically win the series if they are the team with 3 home games. They could lose all three of their home games and win the visiting games FTW.