Plenty of people become feminists, or denounce the label, every single day, just as people adopt and abandon religions; you probably converse with ex-feminists quite regularly here, so from where comes the notion that a feminist will not change positions?

Certainly, there are some feminists (and Christians, Muslims, etc.) who won't, but it literally took five minutes for me to drop kick that label to the curb, and I doubt I'm alone.