Just because something is made out of something doesn’t mean it is that thing. Here in Germany for example, sth that doesn’t contain at least 50% actual cheese cannot be sold as „cheese“ but as „made out of cheese“.

And actually, American kraft mac n cheese sauce mix does not even contain cheese at all and neither does spray cheese. It contains dairy products like whey and milkfat but literally no actual cheese.

I have no problems with cheese dips or processed cheese that are sometimes less then 10% cheese and mostly just water, fat and some other processed dairy products. They‘re also quite far removed from actual cheese but for one, they actually include cheese and more importantly, they don’t taste like I’m eating warm butter that dreams of being a real cheese someday.

Never tried spray cheese but to be honest, I don’t really feel the need to. I’m certain that actual cheese, be it gouda, emmental, camembert, parmesan, cheddar, brie, edam, mimolette, gorgonzola, feta, mozzarella, fol épi or really almost any non processed cheese does a better job at being cheese than spray cheese, that, per definition, at least where I live, literally isn’t cheese at all.

It contains fat and whey but it's certainly isn't cheese.

Only an American would proclaim it is made of cheese.