Ever tried to grill raclette, vacherinn, gruyère, camembert, reblochon etc? For a couple of raw milk cheeses that are either dedicated to eat grilled/melt or "cold".
Anything like Kraft singles is a joke
There's a reason why people say "the best thing since sliced bread". Sliced cheese has similar structural advantages. What is convenient becomes popular - for better or worse.
You can buy some of those cheeses sliced or grated in the supermarket here. It's not a structural problem.
Plenty of cheeses melt better than those. A whole load of French cheeses are pretty much half melted already!
You can add emulsifying salts to any cheese you want to use in melted form though.
Are you even allowed to call them cheese? I thought they had to be labeled as a processed milk product or something.
They’re called “process cheese product”
Apparently that's the high end, the low end being "process American product slices". Not even allowed to use the word "cheese" in a name.