I get it. I live in the mid-West. Most people haven't heard the neologism. My parents (well educated, sophisticated people) certainly hadn't.
SV is different.
But culturally where I live doesn't matter. We accept the culture. If SV adopts LatinX, then all Latin Americans will have to adopt it.
Imagine being referred to be a noun that you hate! (well you're a visible minority, so I guess you're more aware of this than I).
We despise -nX. I'm willing to adopt your "Latines" as a compromise. But I'll die refusing to use that X ("X" is dehumanizing, as if we're a mere unknown in an eq.)