Question...why would these women want to be part of a Church that doesn’t want them?
Your question is wrongly formed. You should have asked "Why would these women want to be priests in a church which does not recognize female priesthood?" The answer is the same as why sodomites want to be preachers in churches which require their pastors to keep their sexual life within marriage.
As one of them explained: "Our goal is to bring about full equality of women in the Roman Catholic Church," said Meehan, 62. "We love the faith. We love the spirituality. That's why we remain Catholic. We are holding disobedience to an unjust law that discriminates against women. We're willing to go the whole mile with the institution on this."
In essence, out of defiance, not love for Christ and His Church.
Envy, Satan's most successful con.