Basically everywhere you look, you will only find resources on how men and women are or should be equal, etc.
Obviously this is NOT the case, from a biological perspective we are a sexually dimorphic species and males are larger. Also, watching animals, most of situations show males leading (with very few exceptions and sure enough in those exceptions women ARE larger).
Can you point me to other texts where it was also argued that women are NOT equal to men?
Sure: Any biology textbook.
No, that isn't snark: it's just fact.
In terms of physical strength or mental abilities and preferences, it's worth pointing out that such things exist in the population statistically, usually on a normal curve. "Men are taller than women" is true but only in the statistical sense; there are a LOT of women who are taller than the average man, for instance.