I think one reason might be that most tortillas in supermarkets are processed to death as well. Most won't go to a solid Mexican grocer and pick up the good stuff (or it's not available) and to top that off, one thing I've noticed outside of California at least, people double wrap small amounts of food in tortilla, instead of loading up, so they eat 2-4x more tortillas than 'normal' (I'm biased because I am in California and grew up here, we understand tortilla physics and tensile parameters, YMMV).
Whether they are "better for you than bread" depends a whole hell of a lot on the bread, and how its made.
The flour tortillas used for wraps and burritos are 300-500 calories. A small flour tortilla will be in the range you listed and a taco sized corn tortilla is around 50.
Yes, but almost every wrap or burrito you buy at a restaurant are using wraps much larger than that. Perhaps I'm jaded living in southern California and having burritos the size of small logs.
Yeah but the majority of bread is NOT 140 calories. In the UK there is literally one loaf of bread that small because they shrunk the size down and added air to it.
Whether they are "better for you than bread" depends a whole hell of a lot on the bread, and how its made.