[gaijin]

Why did we ever use the Latina/Latino thing in the first place?

We speak English, and our language does not change adjectives based on the sex of the thing.

I would wager Spanish, also, does not use the RULES OF ENGLISH when constructing sentences in Spanish.

Example:

“I saw a gaggle of Latino cheerleaders primping before their appearance at the big game.”

[Verginius Rufus]

In Spanish the masculine form is "unmarked" so it includes any group except those which are exclusively female--so Latinos can be either all male or a mixture of males and females. But the feminists don't like the traditional rules of grammar.

"Latinx" is just a monstrosity...but pretty soon it will be considered hate speech to use anything else.