Sub(stantial Con)fusion

Many people have observed that whenever someone starts a sentence with, "This isn't racist, but..." then you know that the rest of the sentence is going to be totally racist. But I'm hoping to be the first person to start a sentence that way and not be racist. Here it goes:

This isn't racist, but I've noticed that a lot of Subway® franchises are run by people of Indian heritage, or elsewhere in Southern Asia. What's up with that? Again, to emphasize: not racist, since I have no problem with anyone running a Subway. I'm just curious, since it seems surprising.

Of course, it's common for immigrants to set up a restaurant; it makes sense, since you come to a new land, and you don't know much about the customs and traditions. So you take advantage of what you do know, which is your own culture. That's a win-win, because they get established in their new home, and everyone around them gets to experience a new culture. But subs? Don't get me wrong; I enjoy both Subway and Indian food. But you've got to admit that on the spectrum of human food, they're at opposite ends. So I'm wondering how people say, "Let's introduce people to our marvelous culinary culture, with its elaborate language of spices... Nah, on second thought, let's make sandwiches with cold cuts."

I had always hoped this would lead to Indian influence in the subs, and at last, we have a butter chicken sub. So I rushed out and bought one. But I hadn't considered that of course this means I'm likely ordering it from someone intimately familiar with Indian culture, so I'm going to look like the Ignorant White Cultural Appropriator. Or at the very least, I'm going to break her heart when she realizes my sandwich will be such a mangled version of her culture. I mean, what appropriate toppings can you choose for a butter chicken sub out of what's available at Subway? You can't just put mayo on it. Raita isn't available as a sauce, so I chose Ranch dressing as the closest thing, and then felt very guilty over it (though it did go surprisingly well; I recommend it.) So it was weird, but we survived, both I and the Indian Subcontinent. I'll now feel confident ordering the butter chicken sub in the future, whoever makes it.
 
However it's become obvious that this is the direction that popular food is taking, where each culture is represented by one dish which becomes internationally famous. Then we think of that food as being the representative of its entire culinary culture. Don't sample all of Thai food, just try Pad Thai. And then we pick and choose combinations of those things and create new cosmopolitan abominations. For India, the dish is butter chicken. Sorry vindaloo, you're out of luck. For Canada, poutine is emerging as our representative. Want to put them together? Bam! There you go.