There's only a 1 inch difference in circumference between the women's basketball (28.5") and the men's (29.5")
The women's 3 pt. line is the same as men's, 22 feet.
The diameter of a basketball hoop is 18 inches, which is the same for both men and women.
If everyone could shoot 3 pointers at will, nobody would be driving to the net.
Since the goal remains the same size, free throws are easier to make.