A woman is an adult female.
The debate is over folk who identify as adult females but physically are not I'm guessing ?
Think that clouds the issue further. When do girls become women? Frowned upon calling our ladies team, the girls team, yet many women have a girls night out or in. When is men go out ladies/girls would often been heard saying the boys are out on the town.
I've given up trying to use the latest "correct" phase to determine who is what. I always thought guys meant men/boys but it often now used to be a group of mixed sexes, so I give up