There's gringo taco joints and then there's Mexican taquerias.
The gringo taco joints have things like the "Taco Of The Month" that might feature a Panko-battered chicken tender on a bed of crispy bacon, with award-winning Green Chile Queso, Diablo wing sauce, poblano ranch slaw, blue cheese crumbles, and a drizzle of honey, all served on a flour tortilla for $5.75.
The Mexican taquerias serve basic standard fare every day with ingredients that include things like intestines and cheek or head meat. Usually topped with just a little cilantro and queso fresco, and sold for around a buck each.
Both can be quite tasty, and they're certainly not the same thing.