Are you talking about direct object pronouns? At least in the case of Spanish, lo/la is the pronoun for a masculine or feminine noun. It would obviously follow that it's the pronoun for a man and woman, respectively, the same way they would be the pronoun for any other masculine or feminine noun. I don't see how addressing men and women (as a noun) the same as you would any other noun in the language (save some irregularities) means that the cart is pulling the horse.
impossiblefork|8 months ago
It literally means he and she in Latin. Then people started using these to indicate that something was a specific object instead of an object in general.