One of the things I liked about 2e when it came out, was it did away with various male versus female strength restrictions. Not that I ever used that anyways.
Curiously, in the preface to the PHB, Gary Gygax wrote, "You will find no pretentious dictums herein, no baseless limits arbitrarily placed on female strength or male charisma"
But then on page 9, the Strength table has pretentious baseless limits arbitrarily placed on female strength.
Maybe he did not feel like it was baseless. Maybe it was such a ponderous tome, he forgot his train of thought.
Also, many others contributed to the writing of the PHB and DMG. Lawrence Schick wrote he was tasked with putting the DMG together and filling in missing pieces.