That’s a poor analogy because food is a consumable. A better one would be if I went to a hardware store because I wanted a single drill bit. I can buy a multi-pack, but also get the option to buy just the one that I actually need and not have a bunch of useless extras taking up space in my toolbox.
And I don’t care if the deluxe version goes on sale, it’s still paying for an entire second license of the sim when all I want is a single aircraft. I couldn’t care less the quality of the other extras. If i wanted them, I would have bought it from the start.