If I recall correctly, this comes from one of the most despicably sexist episodes in that whole series, Turnabout Intruder, which could be seen as portending the TRA movement with its theme of an immutable female soul that can inhabit a male body. Kirk’s whole point with this quote was basically to dump on women as being lesser than men by nature.

[–] Califasauros 1 points Edited

Yeah...but, I'm afraid that what Captain Kirk understands to be a woman might share quite a lot in common with the understanding of prominent female-identifying males such as Grace Lavery and Andrea Long Chu...except, perhaps, the material-biological reality thang.