In tribal societies, men were considered more important than women because due to no common law, they needed men to protect their tribe and also find means to fulfill the necessities of life as the occupations of that time need men to do those jobs. Now when Noah was telling them that if they accept the message of God, God will bless them with the things they very much needed including rain, and sons. It has nothing to show God’s preference. God has shown his preference in other verses that no matter it is man or woman whoever comes with piety will be rewarded equally.