Why it is necessary for men and women to have different rights and powers?

Let us understand this with the help of mathematical modelling.

Let m and w be the men and women respectively while x and y are the powers of men and women respectively.

We know,

m>w {in terms of biology}

If x = y { their rights and powers are equal}, then

mx>wy
i.e. there is always inequality.

So to make them equal, x must not be equal to y.

i.e. if m=3, w=2 and

m>w or 3>2.

To make the inequation equal, we multiply m by 2 and w by 3. So that,

3*2=2*3 or 6=6

This is just an analogy to make you understand. What I want you to understand is that to make men and women equal, their rights and powers must also be different.