...is what Americans call a 'small hamburger'? I dread to see the large size. I mean seriously... who the *** eats that sort of burger??? Why does that burger even exist?

I don't think people really eat that. It does not look like the kind of meat mountain one would like to climb.
Although, it's only about 1000 calories: one of these days I might eat one and nothing else the rest of the day, as a joke on myself.
No. I'm not going to do that.
A bottle of whiskey and a steak seem like more sensible dietary choices. Start the day with a coffee, keep a nice clear large rocks glass on hand for the whiskey (no ice, that's just what the glass is called), cook the steak, eat some of it, have a multivitamin, and occasionally drink some water and smoke some tobacco. Gnaw on the fat and gristle from the steak later in the day. Maybe have a handful of almonds.
And then one's daily nutritional needs are completed.