Oh brother. Did the deeper meaning of the parable escape you? And when Christ returns to take his bride, we won't be male or female.
*It doesn't supplant God's true Holy Days. It DOES increase the number of days especially set aside and devoted to the Worship of God, but, as a Christian, I would think you'd consider an increase in days devoted specifically to the Worship of God a good thing
God didn't create holy days nilly willy. He created them for specific reasons, to be celebrated at specific times, to show certain events and to teach certain lessons.
These days, Passover, The Feast of Unleavened Bread, Pentecost, The Feast of Trumpets, the Day of Atonement, the feast of Tabernacles and the last great day are not (with the possible exception of Pentecost) are not observed by Catholics. They have been replaced by days that man created. Easter, Christmas, Halloween and whatever other created feast days there are on the liturgical calendar.
And I don't think there's anything "wrong" with adding worship days to these days provided that they're not continuations of abhorrent practices and that we keep in mind that they're not "holy" and that they're merely customs created by men.
*From the Bible show me where you are its authoritative interpreter.
These days, Passover, The Feast of Unleavened Bread, Pentecost, The Feast of Trumpets, the Day of Atonement, the feast of Tabernacles
*From the Bible show me where Jesus taught we must keep those specific days Holy.