Often the case is: a better qualified person is overlooked or not elected because they aren't Hispanic.
Not trying to have this mean any racial disrespect, but it's a thing.
In many of these counties, you probably won't get elected or hired if you aren't Hispanic.
Just the way it is.
I will say that in a place like Uvalde it’s an advantage when applying you are fluently bilingual.
But yeah, nepotism in these places is also huge too. In fact eons ago, when I was pondering where to teach, I was specifically warned about Uvalde by someone who had worked there.
Gotta say though, that was also true to varying extents in small towns across Texas.