Why did the National Organization for Women oppose the Join parenting bill?

That would have told judges to rule join custody except for cases of proven abuse and such. Why oppose that? I thought NOW wanted equality so whats wrong with equal custody. It seems they are after superiority and being considered a superior class.Why did the National Organization for Women oppose the Join parenting bill?
Of course. ';Equality'; is just the buzz word to give their organization legitimacy. They aren't called the National Organization for Women and Men.