God's Response to Miriam and Erin

God strikes Miriam with leprosy but Erin gets to get off quote unquote Scott free and so it looks like God has a preference for men and not so much a preference for women or he's hard on women yes how should we make sense of a passage like that? So the situation is that Miriam and Erin begin to talk against Moses because of his cushite wife. They say has Yahweh spoken only through Moses hasn't he also spoken through us and Yahweh heard this now.