Bro, no one with a clue goes to Texas for tacos. Maybe Cali, but I don't bother for the most part in the US. Am Mexican
There are cooks/chefs from one culture/place in the world living in other spots.
You talk about the possibility, that it could exist in Texas, and I'm telling you no, in my experience, not in Texas.
An apology for coming off so critical but the pretense that food is just as good in the US rarely pans out without breaking out the $$$. Mind you, there are good places, and good food but its the exception and here we are only talking generalities. Just like having good table service.
Unfortunately it is a cultural thing; the food culture that produced, accepts and consumes "I Can't Believe Its Not Butter" cannot have non-"I Can't Believe Its Not Tacos" tacos.
It's bad Tex-Mex, but at least it's recognizable.