I bet if you looked closely at the whole menu you’ll see that they serve different kinds of soups.
Most people (not saying you) just go with what’s popular and don’t look at everything offered closely.
To be fair, my original post stated that you can get most food as long as you're willing to go to a sit down restaurant and wait for it to be prepared to order. or by cooking it yourself.
My point was we don't have enough fast food/street vender with prepared food simmering ready to just pour you a cup like they do in alot foriegn food markets.
During a festival or a streetfair you might see a dude with a big pot simmering pouring out bowls for people. but outside of that , usually the fastest way to get something to eat while on the go is a burger place.
instead we got hotdog trucks