How I see it:

Traditional Values: if you're a gender non-conforming man you're not really a man, if you're a gender non-conforming woman you're not really a woman.

Feminism and gay liberation: if you're GNC, you're as much of a man or a woman as anyone else.

Trans ideology: if you're GNC, you're not really the sex you were "assigned at birth".

We're going backwards.