I wonder myself, but maybe an artist would have reused the background?

This is sadly related to the argument of Germany’s conservative party right now, voting with right-extremists: “look what the left has made me do, we had to vote with Nazis, because the left didn’t vote with us🥲”

I think your post could be misleading. Iirc there are three categories, drinks, food and milk-stuff. So you can absolutely compare frozen pizza with hummus, and maybe the frozen pizza has more protein and the hummus more fat.

The algorithm is on Wikipedia

Ps: I might also be wrong, but this is how I remember :)