Yes, I'm referring to several groups of people - trans men who were born women, intersex people who may have been assigned man or woman, non-binary/queer/agender people who were born with a functional uterus.
All three of those groups might not be women. They may identify as female, but not women. Or they may not identify as female.
Language is evolving and not settled at all, but there's a movement to separate the concepts of "man" and "male". For example, we can probably agree that Bruce Willis is manlier than PeeWee Herman. But they are both male. Manliness, how much a "man" someone is, is a huge spectrum and it's socially defined. Likewise, how "womanly" someone is is a spectrum, and also cultural.
By separating the concepts of man from male, and woman from female, we can discuss how womanly or manly someone is, and what our societies expect from the roles of women and men.
I find it useful. Others have strong aversions to even discussing the concept. I'm happy to answer further questions!