They're marketed as AI. AI has a long standing image built up by movies and other media of being some omniscient computer capable of analyzing the world. These AI companies are very aware of this and leverage it.

And a person with sufficient knowledge could easily give a rough estimate of the calories. A slice of store bought sandwich bread of a given thickness generally has calories within a certain range. So do cheese slices. It's elementary school health class material. We all learn how to calculate calories in a meal. Packaging on food also always has calories, so clearly people know how to estimate it fairly accurately.

If a fifth grader can calculate it but an AI can't, that says a lot about how bad these AIs are. We'll get another series of paid and bought articles saying "AI analyzed IMPOSSIBLE math problem beyond human comprehension and solved it with FACTS and LOGIC", while at the same time being told "bro no you can't expect an ai to calculate calories in a sandwich bro that's impossible bro if you even try that then you're insane for even thinking ai should be used that way bro". These companies need to decide: is AI smart enough to solve hard questions, or is it too useless to calculate something any kid could do by googling calories in a slice of bread and doing some basic arithmetic?