My issue is not with gender neutral endings in romance languages (though I think they're rather underadopted right now), but that for some reason Yankees decided to go with the unpronounceable "X" ending rather than very old and established Latina/o or Latine or even Latin@. In my experience those are way more common than X endings, though I admit I haven't looked at hard data on that.
They could've just called them "Latins/Latin-Americans" but they chose to first a appropriate the grammar for "Latino" then think try to "fix" it in the classic Yankee fashion of not looking at already established norms.

